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| Quiz Number | Title | Author | Level | Points |
| 118038 | U-2 Planes | David, Jack | 4.0 | 0.5 |
| 122743 | U.S Supreme Court, The | Fingeroth, Danny | 5.5 | 1.0 |
| 71998 | U.S. Air Force | Cooper, Jason | 5.2 | 0.5 |
| 123917 | U.S. Air Force (Military Branches), The | Doeden, Matt | 1.8 | 0.5 |
| 79486 | U.S. Air Force (U.S. Armed Forces), The | Doeden, Matt | 2.9 | 0.5 |
| 51151 | U.S. Air Force at War, The | Sievert, Terri | 5.1 | 0.5 |
| 104169 | U.S. Air Force Bombers | Braulick, Carrie A. | 3.1 | 0.5 |
| 104170 | U.S. Air Force Fighters | Braulick, Carrie A. | 3.2 | 0.5 |
| 72460 | U.S. Air Force Fighting Vehicles | Hopkins, Ellen | 6.6 | 1.0 |
| 2093 | U.S. Air Force Special Forces: Combat Controllers | Covert, Kim | 5.3 | 0.5 |
| 2094 | U.S. Air Force Special Forces: Pararescue | Covert, Kim | 5.4 | 0.5 |
| 2095 | U.S. Air Force Special Forces: Special Operations Wings | Boraas, Tracey | 5.8 | 0.5 |
| 81678 | U.S. Air Force Special Operations | Roberts, Jeremy | 7.1 | 1.0 |
| 107846 | U.S. Air Force Spy Planes | Braulick, Carrie A. | 3.7 | 0.5 |
| 101449 | U.S. Air Force Thunderbirds, The | Braulick, Carrie A. | 2.7 | 0.5 |
| 79320 | U.S. Air Force, The | Donovan, Sandy | 6.4 | 1.0 |
| 81163 | U.S. Air Force, The | Jordan, David | 9.1 | 1.0 |
| 113242 | U.S. Air Marshals | Broyles, Matthew | 8.8 | 1.0 |
| 71999 | U.S. Army | Cooper, Jason | 5.3 | 0.5 |
| 123918 | U.S. Army (Military Branches), The | Doeden, Matt | 1.9 | 0.5 |
| 79487 | U.S. Army (U.S. Armed Forces), The | Doeden, Matt | 3.0 | 0.5 |
| 51152 | U.S. Army at War, The | Sievert, Terri | 5.2 | 0.5 |
| 72461 | U.S. Army Fighting Vehicles | Bartlett, Richard | 7.0 | 1.0 |
| 101450 | U.S. Army Golden Knights, The | Braulick, Carrie A. | 3.1 | 0.5 |
| 104171 | U.S. Army Helicopters | Braulick, Carrie A. | 3.2 | 0.5 |
| 107568 | U.S. Army Humvees | Kaelberer, Angie Peterson | 3.2 | 0.5 |
| 107569 | U.S. Army Infantry Fighting Vehicles | Rustad, Martha E.H. | 3.4 | 0.5 |
| 116128 | U.S. Army National Guard, The | Braulick, Carrie A. | 3.5 | 0.5 |
| 13539 | U.S. Army Rangers | Koons, James | 5.2 | 0.5 |
| 71421 | U.S. Army Rangers at War, The | Green, Michael | 4.9 | 0.5 |
| 101451 | U.S. Army Rangers, The | Braulick, Carrie A. | 2.9 | 0.5 |
| 4576 | U.S. Army Special Operations | Green, Michael | 5.5 | 0.5 |
| 2097 | U.S. Army Special Operations Command: Night Stalkers Special Operations Aviation | Weiser, Andrea | 5.2 | 0.5 |
| 81679 | U.S. Army Special Operations Forces | Roberts, Jeremy | 6.7 | 1.0 |
| 2096 | U.S. Army Special Operations Forces: Airborne Rangers | Burgan, Michael | 5.0 | 0.5 |
| 84942 | U.S. Army Special Operations, The | Kaelberer, Angie Peterson | 3.2 | 0.5 |
| 104172 | U.S. Army Tanks | Braulick, Carrie A. | 3.2 | 0.5 |
| 81164 | U.S. Army, The | Barbier, Mary | 9.3 | 2.0 |
| 79321 | U.S. Army, The | Benson, Michael | 6.7 | 1.0 |
| 120137 | U.S. Border Patrol: Guarding the Nation, The | Miller, Connie Colwell | 3.3 | 0.5 |
| 71337 | U.S. Capitol, The | DeGezelle, Terri | 3.8 | 0.5 |
| 107403 | U.S. Capitol, The | Hempstead, Anne | 7.3 | 1.0 |
| 68302 | U.S. Capitol, The | Schaefer, Lola M. | 4.0 | 0.5 |
| 62541 | U.S. Cavalry and the Indian Wars, The | Raabe, Emily | 4.6 | 0.5 |
| 72000 | U.S. Coast Guard | Cooper, Jason | 5.6 | 0.5 |
| 107847 | U.S. Coast Guard Cutters | Braulick, Carrie A. | 3.6 | 0.5 |
| 81677 | U.S. Coast Guard, The | Benson, Michael | 6.8 | 1.0 |
| 84943 | U.S. Coast Guard, The | Braulick, Carrie A. | 3.0 | 0.5 |
| 123919 | U.S. Coast Guard, The | Doeden, Matt | 2.1 | 0.5 |
| 81165 | U.S. Coast Guard, The | Noble, Dennis L. | 7.7 | 1.0 |
| 120081 | U.S. Congress, The | Fein, Eric | 5.1 | 0.5 |
| 56821 | U.S. Congress, The | Murphy, Patricia J. | 4.2 | 0.5 |
| 80118 | U.S. Congress: Who Represents You, The | Cunningham, Kevin | 6.5 | 1.0 |
| 122744 | U.S. Constitution (Cartoon Nation), The | Peterson, Christine | 5.6 | 1.0 |
| 107681 | U.S. Constitution (Our Government), The | Peterson, Christine | 4.5 | 0.5 |
| 107542 | U.S. Constitution, The | Allen, Kathy | 2.4 | 0.5 |
| 116057 | U.S. Constitution, The | Fradin, Dennis Brindell | 6.4 | 1.0 |
| 54672 | U.S. Constitution, The | Nardo, Don | 7.8 | 1.0 |
| 109022 | U.S. Constitution, The | Pearl, Norman | 4.8 | 0.5 |
| 80119 | U.S. Constitution, The | Teitelbaum, Michael | 8.0 | 1.0 |
| 71484 | U.S. Constitution, The | Williams, Jean Kinney | 7.9 | 1.0 |
| 85825 | U.S. Counterstrike: American Counterterrorism | Katz, Samuel M. | 9.6 | 3.0 |
| 107404 | U.S. Flag, The | Hempstead, Anne | 7.0 | 1.0 |
| 42693 | U.S. Holocaust Memorial Museum | Cooper, Jason | 5.4 | 0.5 |
| 81166 | U.S. Homeland Security Forces, The | Keeter, Hunter | 11.8 | 2.0 |
| 71348 | U.S. House of Representatives, The | Dubois, Muriel L. | 3.9 | 0.5 |
| 122777 | U.S. Immigration | O'Donnell, Liam | 5.6 | 0.5 |
| 83850 | U.S. Involvement in the Middle East: Inciting Conflict | Miller, Debra A. | 11.4 | 5.0 |
| 72001 | U.S. Marine Corps | Cooper, Jason | 5.7 | 0.5 |
| 107570 | U.S. Marine Corps Assault Vehicles | Kaelberer, Angie Peterson | 3.3 | 0.5 |
| 51153 | U.S. Marine Corps at War, The | Abramovitz, Melissa | 5.9 | 0.5 |
| 107571 | U.S. Marine Corps Combat Jets | Rustad, Martha E.H. | 3.2 | 0.5 |
| 2098 | U.S. Marine Corps Special Forces: Recon Marines | Voeller, Edward | 5.4 | 0.5 |
| 79322 | U.S. Marine Corps, The | Benson, Michael | 7.1 | 1.0 |
| 79488 | U.S. Marine Corps, The | Doeden, Matt | 3.1 | 0.5 |
| 81167 | U.S. Marine Corps, The | Keeter, Hunter | 10.3 | 2.0 |
| 123920 | U.S. Marine Corps, The | Reed, Jennifer | 2.5 | 0.5 |
| 101452 | U.S. Marine Expeditionary Units | Braulick, Carrie A. | 2.8 | 0.5 |
| 71422 | U.S. Marine Expeditionary Units at War, The | Green, Michael | 5.6 | 0.5 |
| 120138 | U.S. Marshals Service: Catching Fugitives, The | Miller, Connie Colwell | 3.0 | 0.5 |
| 117369 | U.S. Military: Defending the Nation, The | Gonzalez, Lissette | 4.9 | 0.5 |
| 81680 | U.S. Naval Special Warfare Forces | Donovan, Sandy | 7.1 | 1.0 |
| 72002 | U.S. Navy | Cooper, Jason | 5.4 | 0.5 |
| 104173 | U.S. Navy Aircraft Carriers | Braulick, Carrie A. | 3.3 | 0.5 |
| 86847 | U.S. Navy Alphabet Book | Garnett, Sammie | 4.7 | 0.5 |
| 51154 | U.S. Navy at War, The | Abramovitz, Melissa | 5.6 | 0.5 |
| 107572 | U.S. Navy Cruisers | Rustad, Martha E.H. | 3.6 | 0.5 |
| 107573 | U.S. Navy Destroyers | Rustad, Martha E.H. | 3.5 | 0.5 |
| 78348 | U.S. Navy Fighting Vessels | Baldwin, Carol | 5.3 | 1.0 |
| 13540 | U.S. Navy Seals | Streissguth, Tom | 5.8 | 0.5 |
| 71423 | U.S. Navy SEALs at War, The | Green, Michael | 5.0 | 0.5 |
| 84944 | U.S. Navy SEALs, The | Kaelberer, Angie Peterson | 3.1 | 0.5 |
| 2099 | U.S. Navy Special Forces: SEAL Teams | Burgan, Michael | 5.2 | 0.5 |
| 2100 | U.S. Navy Special Forces: Special Boat Units | Burgan, Michael | 4.8 | 0.5 |
| 104174 | U.S. Navy Submarines | Adamson, Thomas K. | 3.3 | 0.5 |
| 79489 | U.S. Navy, The | Doeden, Matt | 3.0 | 0.5 |
| 81168 | U.S. Navy, The | Jordan, David | 9.5 | 1.0 |
| 123921 | U.S. Navy, The | Reed, Jennifer | 1.9 | 0.5 |
| 80554 | U.S. Navy, The | Streissguth, Tom | 7.3 | 1.0 |
| 71350 | U.S. Presidency, The | Dubois, Muriel L. | 3.8 | 0.5 |
| 65538 | U.S. Presidential Inaugurations | Santella, Andrew | 6.8 | 1.0 |
| 134272 | U.S. Presidents: Truth and Rumors | Price, Sean Stewart | 4.7 | 0.5 |
| 120136 | U.S. Secret Service: Protecting Our Leaders, The | Miller, Connie Colwell | 2.9 | 0.5 |
| 71351 | U.S. Senate, The | Dubois, Muriel L. | 3.9 | 0.5 |
| 51932 | U.S. Soccer Superstars: The Women Are Winners! | Kramer, S.A. | 4.3 | 1.0 |
| 72003 | U.S. Special Operations | Cooper, Jason | 5.8 | 0.5 |
| 72462 | U.S. Special Operations Forces | Hopkins, Ellen | 6.3 | 1.0 |
| 71349 | U.S. Supreme Court, The | Dubois, Muriel L. | 4.3 | 0.5 |
| 115219 | U.S. Supreme Court, The | Elish, Dan | 8.1 | 1.0 |
| 56822 | U.S. Supreme Court, The | Murphy, Patricia J. | 4.4 | 0.5 |
| 123628 | U.S. Supreme Court, The | Suen, Anastasia | 4.7 | 0.5 |
| 111795 | U.S. Symbols | Kishel, Ann-Marie | 3.1 | 0.5 |
| 47058 | U.S. Territories | McNair, Sylvia | 8.1 | 4.0 |
| 68246 | U.S. Transportation Security Administration, The | Wright, John | 9.9 | 2.0 |
| 2571 | U.S. Treasury | Cooper, Jason | 4.9 | 0.5 |
| 42694 | U.S.S. Constitution | Cooper, Jason | 5.0 | 0.5 |
| 118471 | U2 | McIntosh, Kenneth | 7.4 | 2.0 |
| 132537 | Uapitíes | Macken, JoAnn Early | 2.7 | 0.5 |
| 29032 | UCLA Bruins | Wrobel, Scott | 7.2 | 1.0 |
| 8991 | UFO Challenge, The | Rasmussen, Richard | 7.8 | 4.0 |
| 109571 | UFO Mysteries | Grace, N.B. | 5.0 | 0.5 |
| 85546 | UFO: Unidentified Floating Object | Beechen, Adam | 2.8 | 0.5 |
| 81209 | UFOs | Asimov, Isaac | 6.7 | 1.0 |
| 42596 | UFOs | Coville, Bruce | 5.4 | 8.0 |
| 104455 | UFOs | Duncan, John | 8.5 | 2.0 |
| 61931 | UFOs | Gorman, Jacqueline Laks | 4.8 | 0.5 |
| 78803 | UFOs | Herbst, Judith | 5.6 | 1.0 |
| 51462 | UFOs | Netzley, Patricia D. | 9.9 | 3.0 |
| 79440 | UFOs | Sievert, Terri | 4.9 | 0.5 |
| 57321 | UFOs | Stirling, Janet | 7.5 | 1.0 |
| 8993 | UFOs and Aliens | Alschuler, William | 6.7 | 2.0 |
| 133210 | UFOs and Aliens | Rooney, Anne | 5.6 | 1.0 |
| 100205 | UFOs and Crop Circles | Mason, Paul | 6.0 | 1.0 |
| 103462 | UFOs: Alien Abduction and Close Encounters | Jeffrey, Gary | 3.9 | 0.5 |
| 110035 | UFOs: The Roswell Incident | DeMolay, Jack | 3.3 | 0.5 |
| 127861 | UFOs: The Unsolved Mystery | Miller, Connie Colwell | 3.8 | 0.5 |
| 12200 | UFOs: True Mysteries or Hoaxes? | Asimov, Isaac | 6.5 | 0.5 |
| 122012 | UFOs: What Scientists Say May Shock You! | Grace, N.B. | 6.1 | 1.0 |
| 66439 | Ug: Boy Genius of the Stone Age | Briggs, Raymond | 2.3 | 0.5 |
| 2790 | Uganda | Barlas, Robert | 9.8 | 3.0 |
| 29574 | Uganda | Creed, Alexander | 8.6 | 2.0 |
| 81008 | Uganda | Oghojafor, Kingsley | 9.4 | 4.0 |
| 67963 | Uganda | Schemenauer, Elma | 5.1 | 0.5 |
| 133452 | Uganda (Second Series) | Blauer, Ettagale | 7.4 | 3.0 |
| 102665 | Uganda in Pictures (Second Series) | Braun, Eric | 8.7 | 3.0 |
| 6649 | Ugh | Yorinks, Arthur | 2.7 | 0.5 |
| 6649 | Ugh | Yorinks, Arthur | 2.7 | 0.5 |
| 59755 | Ugh! A Bug | Bono, Mary | 2.9 | 0.5 |
| 116436 | Ugh! Icky, Sticky, Gross Stuff in the Hospital | Rosenberg, Pam | 5.8 | 0.5 |
| 86097 | Uglies | Westerfeld, Scott | 5.2 | 13.0 |
| 86097 | Uglies | Westerfeld, Scott | 5.2 | 13.0 |
| 63227 | Ugliest: Amazing Facts About Ugly Animals, The | Doinet, Mymi | 5.6 | 0.5 |
| 123646 | Uglified Ducky: A Maynard Moose Tale, The | Claflin, Willy | 3.6 | 0.5 |
| 102873 | Ugly | Napoli, Donna Jo | 3.3 | 4.0 |
| 102873 | Ugly | Napoli, Donna Jo | 3.3 | 4.0 |
| 12800 | Ugly American, The | Lederer, William J. | 8.2 | 13.0 |
| 110036 | Ugly Bugs | O'Donnell, Kerri | 3.8 | 0.5 |
| 43578 | Ugly Caterpillar, The | Sommer, Carl | 3.1 | 0.5 |
| 102309 | Ugly Duckling (ABDO), The | Andersen, Hans Christian | 4.1 | 0.5 |
| 131574 | Ugly Duckling (North-South Books), The | Andersen, Hans Christian | 3.5 | 0.5 |
| 109151 | Ugly Duckling (Penguin Books), The | Andersen, Hans Christian | 4.8 | 1.0 |
| 111172 | Ugly Duckling (Purple Bear Books), The | Andersen, Hans Christian | 4.4 | 0.5 |
| 14047 | Ugly Duckling (Worthington Press), The | Andersen, Hans Christian | 4.5 | 0.5 |
| 14047 | Ugly Duckling (Worthington Press), The | Andersen, Hans Christian | 4.5 | 0.5 |
| 72170 | Ugly Duckling, The | Blackaby, Susan | 2.2 | 0.5 |
| 131412 | Ugly Duckling, The | Isdora, Rachel | 3.3 | 0.5 |
| 119277 | Ugly Duckling, The | Mitchell, Stephen | 4.7 | 1.0 |
| 115728 | Ugly Duckling, The | Orihuela, Luz | 1.1 | 0.5 |
| 35269 | Ugly Duckling, The | Pinkney, Jerry | 4.5 | 0.5 |
| 130879 | Ugly Duckling, The | Powell, Martin | 1.8 | 0.5 |
| 27272 | Ugly Duckling, The | Smith, Annette | 2.5 | 0.5 |
| 47937 | Ugly Duckling, The | Stein, Meg | 3.1 | 0.5 |
| 31588 | Ugly Duckling, The | Ziefert, Harriet | 1.6 | 0.5 |
| 72170 | Ugly Duckling, The | Blackaby, Susan | 2.2 | 0.5 |
| 35269 | Ugly Duckling, The | Pinkney, Jerry | 4.5 | 0.5 |
| 105663 | Ugly Fish | LaReau, Kara | 2.2 | 0.5 |
| 68617 | Ugly Goddess, The | Marston, Elsa | 5.9 | 10.0 |
| 65244 | Ugly Princess and the Wise Fool, The | Gray, Margaret | 6.0 | 4.0 |
| 65244 | Ugly Princess and the Wise Fool, The | Gray, Margaret | 6.0 | 4.0 |
| 50626 | Ugly Pugsy | Connal, Julie | 4.2 | 0.5 |
| 101330 | Ugly Pumpkin: A Thanksgiving Story, The | Horowitz, Dave | 2.3 | 0.5 |
| 110037 | Ugly Sea Creatures | O'Donnell, Kerri | 3.8 | 0.5 |
| 78838 | Ugly Truckling, The | Gordon, David | 2.5 | 0.5 |
| 112175 | Ugly Truth, The | Ribeiro, Nelson | 2.4 | 1.0 |
| 32425 | Ugly Vegetables, The | Lin, Grace | 3.1 | 0.5 |
| 103064 | Uh Huh! The Story of Ray Charles | Duggleby, John | 8.2 | 5.0 |
| 50318 | Uh-Oh! | Hawes, Alison | 0.4 | 0.5 |
| 114291 | Uh-Oh! | Hooke, R. Schuyler | 0.5 | 0.5 |
| 15240 | Uh-Oh! It's Mama's Birthday! | Thomas, Naturi | 2.3 | 0.5 |
| 122278 | Uh-oh, Cleo | Harper, Jessica | 4.0 | 1.0 |
| 69007 | Uh-Oh, Leonardo! The Adventures of Providence Traveler | Sabuda, Robert | 4.9 | 1.0 |
| 129710 | Uh-oh, Max | Scieszka, Jon | 0.6 | 0.5 |
| 8194 | Uhura's Song | Kagan, Janet | 5.9 | 20.0 |
| 17440 | Ukraine | Bassis, Volodymyr | 6.3 | 0.5 |
| 18095 | Ukraine | Bassis, Volodymyr | 9.6 | 3.0 |
| 68742 | Ukraine | Cooper, Catherine W. | 9.6 | 4.0 |
| 51602 | Ukraine | Corona, Laurel | 10.4 | 5.0 |
| 74802 | Ukraine | Kummer, Patricia | 7.3 | 4.0 |
| 116655 | Ukraine | Van Cleaf, Kristin | 5.5 | 1.0 |
| 62456 | Ukraine | Zemliansky, Pavel | 9.0 | 3.0 |
| 102648 | Ukraine in Pictures (Second Series) | Zuehlke, Jeffrey | 9.3 | 3.0 |
| 18183 | Ukraine: A New Independence | Clay, Rebecca | 6.4 | 1.0 |
| 24178 | Ukraine: Sasha Kotyenko's Painting: Embroidery Time | Touba, Jacquiline | 4.1 | 0.5 |
| 26814 | Ukrainian Egg Decoration: A Holiday Tradition | Stalcup, Ann | 4.3 | 0.5 |
| 15897 | Ulas, Oscar and the Buzzard | Sargent, Dave | 4.2 | 1.0 |
| 110074 | Ultimate Challenge | Hafer, Todd | 5.0 | 3.0 |
| 41103 | Ultimate Escape, The | Cerasini, Marc | 7.0 | 10.0 |
| 43134 | Ultimate Field Trip 1: Adventures in the Amazon Rain Forest | Goodman, Susan E. | 6.2 | 1.0 |
| 43799 | Ultimate Field Trip 2: Digging into Southwest Archeology | Goodman, Susan E. | 5.6 | 1.0 |
| 29951 | Ultimate Field Trip 3: Wading into Marine Biology | Goodman, Susan E. | 5.0 | 1.0 |
| 39895 | Ultimate Field Trip 4: A Week in the 1800s | Goodman, Susan E. | 5.4 | 1.0 |
| 48966 | Ultimate Field Trip 5: Blasting off to Space Academy | Goodman, Susan E. | 5.9 | 1.0 |
| 123400 | Ultimate Guide to Grandmas & Grandpas!, The | Lloyd-Jones, Sally | 2.9 | 0.5 |
| 41163 | Ultimate Risk | Anderson, Mary Newhall | 5.4 | 5.0 |
| 27740 | Ultimate Scoring Machine: I Was Jerry Rice | Korman, Gordon | 4.4 | 2.0 |
| 80775 | Ultimate Spider-Man: Learning Curve | Bendis, Brian Michael | 2.7 | 1.0 |
| 80776 | Ultimate Spider-Man: Power and Responsibility | Bendis, Brian Michael | 2.9 | 1.0 |
| 80776 | Ultimate Spider-Man: Power and Responsibility | Bendis, Brian Michael | 2.9 | 1.0 |
| 14915 | Ultimate Sports: Short Stories by Outstanding Writers for Young Adults | Gallo, Donald R. | 5.1 | 12.0 |
| 117267 | Ultimate Weapon: The Race to Develop the Atomic Bomb, The | Sullivan, Edward T. | 9.5 | 6.0 |
| 46328 | Ultimate, The | Applegate, K.A. | 3.7 | 3.0 |
| 125135 | Ultimos segundos | Fabry, Chris | 4.9 | 6.0 |
| 71327 | Ultra Hush-hush: Espionage and Special Missions | Shapiro, Stephen | 8.8 | 5.0 |
| 120033 | Ultra Magnus | Furman, Simon | 4.5 | 0.5 |
| 57339 | Ultra Marathon Running | Hayhurst, Chris | 6.0 | 1.0 |
| 57340 | Ultra Swimming | Manley, Claudia B. | 7.2 | 1.0 |
| 117906 | Ultra-Organized Cell Systems | Johnson, Rebecca L. | 4.9 | 1.0 |
| 110509 | Ultraviolet Danger: Holes in the Ozone Layer | Martins, John | 9.8 | 2.0 |
| 110888 | Uluru | Hurtig, Jennifer | 5.7 | 0.5 |
| 73101 | Uluru: Australia's Aboriginal Heart | Arnold, Caroline | 7.8 | 1.0 |
| 60669 | Ulysses | Joyce, James | 7.5 | 46.0 |
| 84391 | Ulysses S. Grant | Aller, Susan Bivin | 5.3 | 1.0 |
| 69780 | Ulysses S. Grant | Alter, Judy | 7.8 | 1.0 |
| 116072 | Ulysses S. Grant | Aronson, Billy | 7.9 | 3.0 |
| 82064 | Ulysses S. Grant | Carter, E.J. | 7.0 | 1.0 |
| 57709 | Ulysses S. Grant | Gregson, Susan R. | 5.9 | 1.0 |
| 61308 | Ulysses S. Grant | King, David C. | 9.1 | 3.0 |
| 89755 | Ulysses S. Grant | McLeese, Don | 4.4 | 0.5 |
| 63039 | Ulysses S. Grant | Patrick, Bethanne Kelly | 7.8 | 1.0 |
| 42317 | Ulysses S. Grant | Welsbacher, Anne | 5.2 | 0.5 |
| 62121 | Ulysses S. Grant | Williams, Jean Kinney | 6.3 | 1.0 |
| 49176 | Ulysses S. Grant (Our Presidents) | Gaines, Ann Graham | 5.8 | 1.0 |
| 127081 | Ulysses S. Grant (Presidents of the U.S.A.) | Gaines, Ann Graham | 6.3 | 1.0 |
| 104650 | Ulysses S. Grant and the Road to Appomattox | Sapp, Richard | 8.8 | 2.0 |
| 14084 | Ulysses S. Grant: 18th President of the United States | Falkof, Lucille | 8.4 | 5.0 |
| 128056 | Ulysses S. Grant: 18th President of the United States | Rumsch, BreAnn | 5.5 | 1.0 |
| 77344 | Ulysses S. Grant: America's 18th President | Riehecky, Janet | 7.8 | 2.0 |
| 103035 | Ulysses S. Grant: Defender of the Union | Rice Jr., Earle | 9.9 | 6.0 |
| 102801 | Ulysses S. Grant: Eighteenth President | Venezia, Mike | 5.5 | 0.5 |
| 868 | Ulysses S. Grant: Eighteenth President of the United States | Kent, Zachary | 7.4 | 2.0 |
| 55893 | Ulysses S. Grant: Military Leader and President | O'Shei, Tim | 5.7 | 1.0 |
| 85242 | Ulysses S. Grant: Union General and U.S. President | Haugen, Brenda | 7.2 | 2.0 |
| 102117 | Um, Like...OM: A Girl Goddess's Guide to Yoga | Cooper, Evan | 6.9 | 5.0 |
| 60803 | umbral de la noche, El | King, Stephen | 5.2 | 20.0 |
| 7596 | Umbrella | Yashima, Taro | 4.0 | 0.5 |
| 32152 | Umbrella Man, The | Dahl, Roald | 5.5 | 12.0 |
| 69286 | Umbrella Party, The | Lunn, Janet | 2.7 | 0.5 |
| 124207 | Umbrella Queen, The | Bridges, Shirin Yim | 4.2 | 0.5 |
| 131217 | Umbrella Summer | Graff, Lisa | 4.6 | 6.0 |
| 84208 | Umbrella, The | Brett, Jan | 2.7 | 0.5 |
| 84208 | Umbrella, The | Brett, Jan | 2.7 | 0.5 |
| 47182 | Umbrellas | Josephson, Judith Pinkerton | 6.2 | 1.0 |
| 121851 | Umbrellas Everywhere! | Grace, Elora | 1.1 | 0.5 |
| 80306 | Un-Magician, The | Golden, Christopher | 7.0 | 12.0 |
| 21452 | Un-Wedding, The | Cole, Babette | 3.4 | 0.5 |
| 36593 | Unafraid of the Dark | Bray, Rosemary L. | 7.3 | 18.0 |
| 16195 | Unbeatable Bread, The | Hoopes, Lyn Littlefield | 4.0 | 0.5 |
| 124506 | Unbelievable: A Pretty Little Liars Novel | Shepard, Sara | 4.9 | 11.0 |
| 53725 | Unbreakable Code, The | Hunter, Sara Hoagland | 4.2 | 0.5 |
| 77886 | Unbridled Fury | Dickerson, Karle | 5.4 | 5.0 |
| 29534 | Unbroken | Haas, Jessie | 5.4 | 7.0 |
| 29534 | Unbroken | Haas, Jessie | 5.4 | 7.0 |
| 118359 | Uncanny Can, The | Mecozzi, Maureen | 4.5 | 0.5 |
| 54977 | Uncertain Path, The | Watson, Jude | 4.6 | 4.0 |
| 79145 | Unchained Memories: Readings from the Slave Narratives | Gates Jr., Henry Louis | 7.8 | 4.0 |
| 129045 | Uncharted | Hapka, Catherine | 5.8 | 7.0 |
| 63126 | Uncharted Lands | Hamilton, John | 6.4 | 1.0 |
| 106517 | Uncharted Waters | Bulion, Leslie | 4.1 | 6.0 |
| 86306 | Uncivil Acts | Keene, Carolyn | 5.0 | 4.0 |
| 11347 | Uncivil War | Dixon, Franklin W. | 4.9 | 4.0 |
| 32681 | Uncivil War, The | Klass, Sheila Solomon | 4.2 | 4.0 |
| 24974 | Unclaimed Treasures | MacLachlan, Patricia | 4.0 | 3.0 |
| 64466 | Uncle Andy's | Warhola, James | 4.1 | 0.5 |
| 131415 | Uncle Andy's Cats | Warhola, James | 3.7 | 0.5 |
| 129173 | Uncle Bigfoot | O'Connor, George | 2.4 | 0.5 |
| 121740 | Uncle Bobby's Wedding | Brannen, Sarah S. | 2.7 | 0.5 |
| 53985 | Uncle Chente's Picnic | Bertrand, Diane Gonzales | 3.7 | 0.5 |
| 52629 | Uncle Daddy | Fletcher, Ralph | 3.5 | 3.0 |
| 12470 | Uncle Daney's Way | Haas, Jessie | 4.6 | 4.0 |
| 12470 | Uncle Daney's Way | Haas, Jessie | 4.6 | 4.0 |
| 115242 | Uncle Duncle Chronicles: Escape from Treasure Island, The | Krill, Darren | 7.1 | 12.0 |
| 7399 | Uncle Elephant | Lobel, Arnold | 2.9 | 0.5 |
| 7399 | Uncle Elephant | Lobel, Arnold | 2.9 | 0.5 |
| 4126 | Uncle Elephant and Uncle Tiger | Cowley, Joy | 1.5 | 0.5 |
| 30316 | Uncle Farley's False Teeth | Walsh, Alice | 3.1 | 0.5 |
| 16394 | Uncle Foster's Hat Tree | Cushman, Doug | 2.0 | 0.5 |
| 21695 | Uncle Henry's Dinner Guests | Froissart, Bénédicte | 3.4 | 0.5 |
| 7194 | Uncle Jed's Barbershop | Mitchell, Margaree King | 3.8 | 0.5 |
| 7194 | Uncle Jed's Barbershop | Mitchell, Margaree King | 3.8 | 0.5 |
| 124896 | Uncle Monarch and the Day of the Dead | Goldman, Judy | 5.1 | 0.5 |
| 120787 | Uncle Montague's Tales of Terror | Priestley, Chris | 6.0 | 7.0 |
| 18321 | Uncle Nacho's Hat | Rohmer, Harriet | 2.4 | 0.5 |
| 108196 | Uncle Pat and Auntie Pat | West, Colin | 3.0 | 0.5 |
| 104187 | Uncle Peter's Amazing Chinese Wedding | Look, Lenore | 4.2 | 0.5 |
| 4231 | Uncle Phil's Diner | Pittman, Helena Clare | 3.2 | 0.5 |
| 123417 | Uncle Pirate | Rees, Douglas | 3.4 | 2.0 |
| 46579 | Uncle Rain Cloud | Johnston, Tony | 3.1 | 0.5 |
| 20493 | Uncle Ronald | Doyle, Brian | 5.3 | 5.0 |
| 71803 | Uncle Russ and the Letter U | Klingel, Cynthia | 1.9 | 0.5 |
| 110097 | Uncle Sam | Hicks, Terry Allan | 5.6 | 0.5 |
| 59700 | Uncle Sam | Marcovitz, Hal | 7.5 | 1.0 |
| 123629 | Uncle Sam | Suen, Anastasia | 4.0 | 0.5 |
| 71338 | Uncle Sam | Yanuck, Debbie L. | 3.1 | 0.5 |
| 36234 | Uncle Sam and Old Glory: Symbols of America | West, Delno C. | 7.3 | 1.0 |
| 11132 | Uncle Sam Wants You! Military Men & Women of W W II | Whitman, Sylvia | 7.5 | 3.0 |
| 123259 | Uncle Sam's America: A Parade Through Our Star-Spangled History | Hewitt, David | 5.6 | 0.5 |
| 53220 | Uncle Snake | Gollub, Matthew | 3.9 | 0.5 |
| 21398 | Uncle Switch | Kennedy, X.J. | 4.7 | 0.5 |
| 27428 | Uncle Tease | Javernick, Ellen | 3.5 | 1.0 |
| 82701 | Uncle Ted and the Hiccups | Eggleton, Jill | 1.8 | 0.5 |
| 82756 | Uncle Ted Is Tricky! | Eggleton, Jill | 1.1 | 0.5 |
| 82757 | Uncle Ted's Teeth | Eggleton, Jill | 1.2 | 0.5 |
| 16725 | Uncle Tom's Cabin | Stowe, Harriet Beecher | 9.3 | 32.0 |
| 83920 | Uncle Tom's Cabin and the Abolitionist Movement | Carlson, Julie | 7.8 | 1.0 |
| 60053 | Uncle Tungsten: Memories of a Chemical Boyhood | Sacks, Oliver | 10.7 | 25.0 |
| 9965 | Uncle Vampire | Grant, Cynthia D. | 3.6 | 4.0 |
| 9965 | Uncle Vampire | Grant, Cynthia D. | 3.6 | 4.0 |
| 66497 | Uncle Vova's Tree | Polacco, Patricia | 4.6 | 0.5 |
| 58975 | Uncle Willie and the Soup Kitchen | DiSalvo-Ryan, DyAnne | 3.3 | 0.5 |
| 50144 | Uncle's Bakery | Rau, Dana Meachen | 1.2 | 0.5 |
| 4101 | Uncle's Clever Tricks | Cowley, Joy | 0.9 | 0.5 |
| 31842 | Uncles | Schaefer, Lola M. | 1.1 | 0.5 |
| 119322 | Uncles (Revised Edition) | Schaefer, Lola M. | 1.1 | 0.5 |
| 82648 | Uncles and Antlers | Wheeler, Lisa | 2.2 | 0.5 |
| 47253 | Uncommon Champions: Fifteen Athletes Who Battled Back | Kaminsky, Marty | 7.6 | 5.0 |
| 73118 | Uncommon Faith | Krisher, Trudy | 5.9 | 12.0 |
| 24676 | Uncommon Farm Animals | Hansen, Ann Larkin | 4.4 | 0.5 |
| 76960 | Uncommon Revolutionary: A Story About Thomas Paine | Waxman, Laura Hamilton | 6.1 | 1.0 |
| 43954 | Uncommon Traveler: Mary Kingsley in Africa | Brown, Don | 4.6 | 0.5 |
| 55428 | Uncool! | Griffiths, Susan | 5.5 | 1.0 |
| 14927 | Uncovered! Weird, Weird Stories | Jennings, Paul | 3.1 | 4.0 |
| 63746 | Uncovering Earth's History | Phelan, Glen | 5.9 | 1.0 |
| 135078 | Uncovering Mummies and Other Mysteries of the Ancient World | Harrison, Paul | 5.2 | 0.5 |
| 131454 | Uncovering Mummies: An Isabel Soto Archaeology Adventure | Biskup, Agnieszka | 4.1 | 0.5 |
| 69593 | Uncovering Sadie's Secrets | Sternberg, Libby | 5.1 | 8.0 |
| 19799 | Undaunted Courage | Ambrose, Stephen E. | 9.0 | 42.0 |
| 42760 | Undead, The | Myers, Bill | 4.7 | 4.0 |
| 128315 | Under a Black Cloud: Our Atmosphere Under Attack | Spalding, Frank | 8.6 | 2.0 |
| 27958 | Under a Different Sky | Savage, Deborah | 5.3 | 11.0 |
| 27958 | Under a Different Sky | Savage, Deborah | 5.3 | 11.0 |
| 102846 | Under a Living Sky | Simons, Joseph | 4.5 | 3.0 |
| 103049 | Under a Microscope: Small Life | Friesen, Helen Lepp | 6.1 | 1.0 |
| 57748 | Under a Prairie Sky | Carter, Anne Laurel | 2.4 | 0.5 |
| 55588 | Under a Shooting Star | Trottier, Maxine | 5.4 | 8.0 |
| 102864 | Under a Stand Still Moon | Creel, Ann Howard | 5.9 | 7.0 |
| 29922 | Under a Stone | Green, Jen | 5.2 | 0.5 |
| 28797 | Under a Strong Wind | Morrison, Dorothy Nafus | 6.9 | 5.0 |
| 57123 | Under a War-Torn Sky | Elliott, L.M. | 4.8 | 10.0 |
| 57123 | Under a War-Torn Sky | Elliott, L.M. | 4.8 | 10.0 |
| 5926 | Under Alien Stars | Service, Pamela F. | 7.2 | 9.0 |
| 5926 | Under Alien Stars | Service, Pamela F. | 7.2 | 9.0 |
| 108722 | Under and Alone: The True Story of the Undercover Agent Who Infiltrated America' | Queen, William | 7.2 | 14.0 |
| 106332 | Under Construction | Herman, Gail | 1.3 | 0.5 |
| 50167 | Under Copp's Hill | Ayres, Katherine | 4.1 | 5.0 |
| 43899 | Under Cover of Darkness: Animals That Move at Night | Graham, Pamela | 6.3 | 1.0 |
| 11998 | Under Eastern Stars | Chaikin, Linda | 5.6 | 15.0 |
| 105210 | Under Fire in World War II (Freestyle Express) | Fitzgerald, Brian | 4.7 | 1.0 |
| 113848 | Under Fire in World War II (Freestyle) | Fitzgerald, Brian | 6.6 | 1.0 |
| 19766 | Under His Spell | Keene, Carolyn | 4.6 | 4.0 |
| 32289 | Under My Nose | Ehlert, Lois | 4.2 | 0.5 |
| 47523 | Under New York | High, Linda Oatman | 3.8 | 0.5 |
| 124905 | Under Occupation | Adams, Simon | 8.7 | 1.0 |
| 87862 | Under One Flag: A Year at Rohwer | Parkhurst, Liz Smith | 4.5 | 0.5 |
| 53923 | Under One Rock: Bugs, Slugs and Other Ughs | Fredericks, Anthony D. | 4.0 | 0.5 |
| 131641 | Under Pressure: Handling the Stresses of Keeping Up | Earl, Sari | 5.5 | 2.0 |
| 47938 | Under Sail | Feely, Jenny | 3.5 | 0.5 |
| 43656 | Under Siege | Greene, Janice | 3.8 | 1.0 |
| 43656 | Under Siege | Greene, Janice | 3.8 | 1.0 |
| 129833 | Under Siege! Three Children at the Civil War Battle for Vicksburg | Warren, Andrea | 7.9 | 6.0 |
| 74916 | Under the Banner of Heaven: A Story of Violent Faith | Krakauer, Jon | 10.0 | 23.0 |
| 113086 | Under the Banyan Tree | De Palma, Toni | 5.0 | 5.0 |
| 107175 | Under the Baseball Moon | Ritter, John H. | 4.7 | 9.0 |
| 104282 | Under the Bed | Bright, Paul | 3.3 | 0.5 |
| 48547 | Under the Big Sky | Romain, Trevor | 3.5 | 0.5 |
| 122160 | Under the Black Ensign | Hubbard, L. Ron | 5.9 | 3.0 |
| 11744 | Under the Blood-Red Sun | Salisbury, Graham | 4.0 | 8.0 |
| 11744 | Under the Blood-Red Sun | Salisbury, Graham | 4.0 | 8.0 |
| 11744 | Under the Blood-Red Sun | Salisbury, Graham | 4.0 | 8.0 |
| 79708 | Under the Breadfruit Tree: Island Poems | Gunning, Monica | 4.3 | 0.5 |
| 12487 | Under the Bridge | McKenzie, Ellen | 4.1 | 5.0 |
| 41794 | Under the Cat's Eye: A Tale of Morph and Mystery | Rubinstein, Gillian | 5.1 | 7.0 |
| 64975 | Under the Christmas Tree | Grimes, Nikki | 2.7 | 0.5 |
| 101626 | Under the City | Kroll, Steven | 3.1 | 0.5 |
| 133246 | Under the Diehard Brand | Hubbard, L. Ron | 5.9 | 4.0 |
| 70087 | Under the Domim Tree | Almagor, Gila | 5.3 | 7.0 |
| 123466 | Under the Ground | Milbourne, Anna | 3.7 | 0.5 |
| 54026 | Under the Ground | Pluckrose, Henry | 2.8 | 0.5 |
| 72937 | Under the Helmet: Inside the Mind of a Driver | Cavin, Curt | 5.1 | 0.5 |
| 115875 | Under the Hood | Doeden, Matt | 4.8 | 0.5 |
| 61298 | Under the Ice | Conlan, Kathy | 6.2 | 1.0 |
| 88794 | Under the Jolly Roger: Being an Account of the Further Nautical Adventures of Ja | Meyer, L.A. | 5.7 | 23.0 |
| 114545 | Under the Kissletoe: Christmastime Poems | Lewis, J. Patrick | 4.4 | 0.5 |
| 26762 | Under the Lemon Moon | Fine, Edith Hope | 2.9 | 0.5 |
| 133935 | Under the Lights: Exploring the Secrets of a Sports Stadium | Enz, Tammy | 4.2 | 0.5 |
| 51503 | Under the Lilacs | Alcott, Louisa May | 8.2 | 15.0 |
| 14780 | Under the Mermaid Angel | Moore, Martha | 4.6 | 6.0 |
| 82681 | Under the Microscope | Gibson, Brylee | 1.5 | 0.5 |
| 129020 | Under the Mishmash Trees | King-Smith, Dick | 4.7 | 1.0 |
| 54377 | Under the Mushroom Cloud | Schraff, Anne | 4.4 | 3.0 |
| 54377 | Under the Mushroom Cloud | Schraff, Anne | 4.4 | 3.0 |
| 31938 | Under the Ocean | Jose, Isabella | 2.4 | 0.5 |
| 105194 | Under the Overpass: A Journey of Faith on the Streets of America | Yankoski, Michael | 5.9 | 9.0 |
| 28521 | Under the Pear Tree | Seabrooke, Brenda | 5.4 | 1.0 |
| 100512 | Under the Persimmon Tree | Staples, Suzanne Fisher | 5.9 | 9.0 |
| 100512 | Under the Persimmon Tree | Staples, Suzanne Fisher | 5.9 | 9.0 |
| 55924 | Under the Quilt of Night | Hopkinson, Deborah | 3.0 | 0.5 |
| 55924 | Under the Quilt of Night | Hopkinson, Deborah | 3.0 | 0.5 |
| 119959 | Under the Radar | Appleton, Victor | 4.9 | 4.0 |
| 127467 | Under the Red Sun | Hoena, Blake A. | 4.3 | 1.0 |
| 28240 | Under the Royal Palms | Ada, Alma Flor | 6.6 | 3.0 |
| 69688 | Under the Same Sky | DeFelice, Cynthia | 4.8 | 8.0 |
| 69688 | Under the Same Sky | DeFelice, Cynthia | 4.8 | 8.0 |
| 73017 | Under the Sea | Baker, Liza | 2.6 | 0.5 |
| 103106 | Under the Sea | Chapman, Simon | 7.0 | 2.0 |
| 47939 | Under the Sea | O'Neil, Sarah | 3.4 | 0.5 |
| 102476 | Under the Sea | Patchett, Fiona | 2.9 | 0.5 |
| 28047 | Under the Sea | Royston, Angela | 3.8 | 0.5 |
| 74485 | Under the Sea | Smith, Alastair | 2.9 | 0.5 |
| 16492 | Under the Sea | Talbot, Frank H. | 7.3 | 1.0 |
| 45842 | Under the Sea | Wilkes, Angela | 4.7 | 0.5 |
| 121253 | Under the Sea | World Book Editors | 4.1 | 0.5 |
| 68120 | Under the Sea 1, 2, 3: Counting Ocean Life | Knox, Barbara | 1.8 | 0.5 |
| 6650 | Under the Sea from A to Z | Doubilet, Anne | 6.2 | 1.0 |
| 6650 | Under the Sea from A to Z | Doubilet, Anne | 6.2 | 1.0 |
| 87649 | Under the Sea with Googol and Googolplex | Kazenbroot, Nelly | 3.4 | 1.0 |
| 54503 | Under the Serpent Sea | Abbott, Tony | 3.6 | 2.0 |
| 54503 | Under the Serpent Sea | Abbott, Tony | 3.6 | 2.0 |
| 21779 | Under the Shadow of Wings | Banks, Sara Harrell | 4.5 | 4.0 |
| 131467 | Under the Snow | Stewart, Melissa | 3.4 | 0.5 |
| 68620 | Under the Stars | Baglio, Ben M. | 4.8 | 4.0 |
| 129455 | Under the Stars | Perelman, Helen | 4.5 | 5.0 |
| 86355 | Under the Sun | Dorros, Arthur | 5.3 | 10.0 |
| 68489 | Under the Sunday Tree | Greenfield, Eloise | 4.6 | 0.5 |
| 7097 | Under the Sweetwater Rim | L'Amour, Louis | 5.8 | 8.0 |
| 51933 | Under the Water | Ziefert, Harriet | 2.1 | 0.5 |
| 51379 | Under the Waterfall | Brin, Susannah | 4.2 | 1.0 |
| 80069 | Under the Watsons' Porch | Shreve, Susan Richards | 5.1 | 6.0 |
| 133316 | Under the Waves | Woodward, John | 5.2 | 1.0 |
| 66567 | Under the Western Acacia | Jacq, Christian | 6.8 | 14.0 |
| 87423 | Under the Wild Western Sky | Arnosky, Jim | 5.7 | 0.5 |
| 82595 | Under the Wolf, Under the Dog | Rapp, Adam | 5.2 | 9.0 |
| 81739 | Under Town | Ogden, Charles | 5.5 | 3.0 |
| 74874 | Under Water | Greenburg, J.C. | 3.8 | 1.0 |
| 50688 | Under Western Eyes | Conrad, Joseph | 9.1 | 21.0 |
| 120269 | Under Your Skin: Your Amazing Body | Manning, Mick | 5.0 | 0.5 |
| 58930 | Under, Over, by the Clover: What Is a Preposition? | Cleary, Brian P. | 3.2 | 0.5 |
| 118253 | Undercover | Kephart, Beth | 5.5 | 6.0 |
| 67703 | Undercover Agents | Fine, Jil | 6.6 | 1.0 |
| 25611 | Undercover Angels | John, Laurie | 4.5 | 8.0 |
| 40987 | Undercover Artists | Baer, Judy | 4.5 | 4.0 |
| 127545 | Undercover Goalie | Banscherus, J. | 3.4 | 1.0 |
| 107615 | Undercover Kid: Tuna Surprise | Kidd, Ronald | 2.7 | 0.5 |
| 11450 | Undercover Tailback | Christopher, Matt | 3.8 | 3.0 |
| 11450 | Undercover Tailback | Christopher, Matt | 3.8 | 3.0 |
| 64515 | Undercurrents | Roberts, Willo Davis | 5.2 | 8.0 |
| 64515 | Undercurrents | Roberts, Willo Davis | 5.2 | 8.0 |
| 79054 | Underdog | Walters, Eric | 3.6 | 3.0 |
| 79054 | Underdog | Walters, Eric | 3.6 | 3.0 |
| 21586 | Underdogs, The | Azuela, Mariano | 6.0 | 6.0 |
| 27163 | Underfoot | Schwartz, David M. | 3.0 | 0.5 |
| 107118 | Undergardeners, The | Ellis, Desmond Anthony | 4.9 | 3.0 |
| 118323 | Underground | Ferris, Jean | 4.6 | 6.0 |
| 59241 | Underground | Klingel, Cynthia | 2.0 | 0.5 |
| 75174 | Underground | Macaulay, David | 8.7 | 2.0 |
| 78369 | Underground Adventure | Graf, Mike | 3.2 | 0.5 |
| 65896 | Underground and All Around | Linde, Barbara | 3.7 | 0.5 |
| 129873 | Underground Gators, The | Casey, Tina | 3.3 | 0.5 |
| 111859 | Underground Habitats | Aloian, Molly | 3.2 | 0.5 |
| 122261 | Underground Homes | Bauer, Jeff | 2.5 | 0.5 |
| 53579 | Underground Man | Meltzer, Milton | 5.1 | 8.0 |
| 118671 | Underground Railroad | Brown, Risa | 2.9 | 0.5 |
| 116693 | Underground Railroad | Dunn, Joe | 4.2 | 0.5 |
| 128454 | Underground Railroad (Revised), The | Williams, Carla | 5.3 | 0.5 |
| 16135 | Underground Railroad in American History, The | Sawyer, Kem Knapp | 8.4 | 3.0 |
| 61560 | Underground Railroad, The | Ashby, Ruth | 7.4 | 1.0 |
| 44834 | Underground Railroad, The | Bial, Raymond | 7.8 | 1.0 |
| 84298 | Underground Railroad, The | Boekhoff, P.M | 6.8 | 1.0 |
| 45195 | Underground Railroad, The | Heinrichs, Ann | 5.2 | 0.5 |
| 86297 | Underground Railroad, The | Pierce, Alan | 6.1 | 1.0 |
| 25121 | Underground Railroad, The | Stein, R. Conrad | 6.7 | 1.0 |
| 59280 | Underground Railroad, The | Williams, Carla | 5.1 | 1.0 |
| 73064 | Underground Railroad: A Primary Source History of the Journey to Freedom, The | Wolny, Philip | 8.6 | 2.0 |
| 62719 | Underground Railroad: Bringing Slaves North to Freedom, The | Monroe, Judy | 5.7 | 1.0 |
| 68192 | Underground Railroad: Next Stop, Toronto!, The | Shadd, Adrienne | 8.9 | 3.0 |
| 100067 | Underground Reporters, The | Kacer, Kathy | 6.1 | 5.0 |
| 33165 | Underground to Canada | Smucker, Barbara | 5.2 | 5.0 |
| 121898 | Underground Towns, Treetops, and Other Animal Hiding Places | Halpern, Monica | 4.2 | 0.5 |
| 34889 | Underground Train | Quattlebaum, Mary | 3.0 | 0.5 |
| 87579 | Underground Worlds | Arnott, Leslie | 5.5 | 0.5 |
| 18994 | Underground, The | Applegate, K.A. | 3.9 | 4.0 |
| 42247 | Underground, The | Jenkins, Jerry B. | 4.1 | 3.0 |
| 122589 | Underneath, The | Appelt, Kathi | 5.2 | 9.0 |
| 128046 | Underpants on My Head | Harper, Jessica | 3.7 | 1.0 |
| 52445 | Undersea City: A Story of a Caribbean Coral Reef | Rau, Dana Meachen | 4.4 | 0.5 |
| 26410 | Undersea People, The | Bunting, Eve | 3.7 | 0.5 |
| 47863 | Understand the Unknown | Applegate, K.A. | 5.5 | 5.0 |
| 1799 | Understanding Alternative Medicine | Rattenbury, Jeanne | 10.0 | 4.0 |
| 4964 | Understanding Anorexia Nervosa | Stanley, Debbie | 8.3 | 3.0 |
| 48344 | Understanding Buddy | Kornblatt, Marc | 4.3 | 2.0 |
| 4971 | Understanding Bulimia Nervosa | Stanley, Debbie | 8.9 | 4.0 |
| 4969 | Understanding Compulsive Eating | Simpson, Carolyn | 8.1 | 5.0 |
| 133094 | Understanding Cycles and Systems | Solway, Andrew | 6.0 | 1.0 |
| 80567 | Understanding Differences | Weber, Rebecca | 3.8 | 0.5 |
| 4973 | Understanding Eating Disorder Support Groups | Moehn, Heather | 8.3 | 5.0 |
| 63757 | Understanding Electricity | Tomecek, Steve | 6.1 | 1.0 |
| 4965 | Understanding Exercise Addiction | Johnson, Marlys | 7.8 | 5.0 |
| 4966 | Understanding Food and Your Family | Tattersall, Clare | 7.1 | 4.0 |
| 124259 | Understanding Global Warming | Johnson, Rebecca L. | 6.5 | 2.0 |
| 116093 | Understanding Global Warming with Max Axiom, Super Scientist | Biskup, Agnieszka | 6.1 | 0.5 |
| 1499 | Understanding Horses and Ponies | Budd, Jackie | 6.8 | 3.0 |
| 71574 | Understanding Human Rights | Watson, Susan | 6.7 | 1.0 |
| 117423 | Understanding Landforms | Taylor, Barbara | 7.1 | 1.0 |
| 132425 | Understanding Models | Sturm, Jeanne | 7.1 | 1.0 |
| 112837 | Understanding Photosynthesis with Max Axiom, Super Scientist | O'Donnell, Liam | 5.2 | 0.5 |
| 4970 | Understanding Recovery from Eating Disorders | Rocha, Toni L. | 8.6 | 5.0 |
| 64592 | Understanding September 11th: Answering Questions About the Attacks on America | Frank, Mitch | 8.1 | 5.0 |
| 63697 | Understanding Shakespeare's England: A Companion for the American Reader | McMurtry, Jo | 10.6 | 16.0 |
| 4967 | Understanding Sports and Eating Disorders | Stanley, Debbie | 9.0 | 4.0 |
| 129145 | Understanding Taxes | Minden, Cecilia | 5.8 | 1.0 |
| 126954 | Understanding the Articles of Confederation | Isaacs, Sally Senzell | 5.6 | 0.5 |
| 126955 | Understanding the Bill of Rights | Isaacs, Sally Senzell | 6.0 | 0.5 |
| 63758 | Understanding the Brain | Jerome, Kate Boehm | 6.0 | 1.0 |
| 4968 | Understanding the Causes of a Negative Body Image | Moe, Barbara | 7.6 | 5.0 |
| 126956 | Understanding the Declaration of Independence | Isaacs, Sally Senzell | 5.2 | 0.5 |
| 103286 | Understanding the Holy Land: Answering Questions about the Israeli-Palestinian C | Frank, Mitch | 8.7 | 7.0 |
| 2690 | Understanding the Law: A Teen Guide to Family Court and Minor's Rights | Bianchi, Anne | 9.6 | 2.0 |
| 4974 | Understanding the Risks of Diet Drugs | Walker, Pamela | 7.9 | 5.0 |
| 126957 | Understanding the U.S. Constitution | Isaacs, Sally Senzell | 5.6 | 0.5 |
| 62476 | Understanding the Weather | Batigne, Stéphane | 9.6 | 2.0 |
| 127806 | Understanding Viruses with Max Axiom, Super Scientist | Biskup, Agnieszka | 5.6 | 0.5 |
| 119899 | Understanding Volcanoes and Earthquakes | Green, Jen | 4.7 | 0.5 |
| 4963 | Understanding Weight and Depression | Clarke, Julie M. | 8.3 | 5.0 |
| 4972 | Understanding Weight Loss Programs | Monroe, Judy | 7.3 | 4.0 |
| 92 | Understood Betsy | Fisher, Dorothy Canfield | 5.9 | 8.0 |
| 92 | Understood Betsy | Fisher, Dorothy Canfield | 5.9 | 8.0 |
| 50627 | Understudies | Parsons, John | 4.6 | 0.5 |
| 131120 | Undertaker | O'Shei, Tim | 4.8 | 0.5 |
| 80142 | Undertaker's Gone Bananas, The | Zindel, Paul | 6.5 | 8.0 |
| 60465 | Undertaker: Pro Wrestler Mark Callaway, The | Schaefer, A.R. | 4.7 | 1.0 |
| 48372 | Underwater | James, Diane | 3.6 | 0.5 |
| 116716 | Underwater | Levy, Debbie | 4.7 | 5.0 |
| 128191 | Underwater | Murray, Julie | 3.7 | 0.5 |
| 59754 | Underwater Alphabet Book, The | Pallotta, Jerry | 3.8 | 0.5 |
| 16493 | Underwater Animals | Cooney, Helen | 5.0 | 0.5 |
| 36174 | Underwater Animals | Dalgleish, Sharon | 4.3 | 0.5 |
| 46580 | Underwater Counting: Even Numbers | Pallotta, Jerry | 3.7 | 0.5 |
| 126005 | Underwater Explorers: Marine Biologists | Peterson, Judy Monroe | 5.1 | 0.5 |
| 31826 | Underwater Journey | Cutting, Brian | 1.4 | 0.5 |
| 79368 | Underwater Life | Davies, Valerie | 6.3 | 1.0 |
| 118447 | Underwater Life | Miller-Schroeder, Patricia | 4.4 | 0.5 |
| 85768 | Underwater Machines | Bailey, Gerry | 6.3 | 1.0 |
| 26267 | Underwater Musicians | Souza, D.M. | 5.7 | 0.5 |
| 103533 | Underwater Warfare of the Future | West, Krista | 7.9 | 2.0 |
| 16524 | Underwater Weapons | Stone, Lynn M. | 4.3 | 0.5 |
| 16494 | Underwater World | Time-Life Editors | 8.9 | 3.0 |
| 45260 | Underwear Do's and Don'ts | Parr, Todd | 1.6 | 0.5 |
| 44058 | Underwear! | Monsell, Mary Elise | 3.4 | 0.5 |
| 124445 | Underwear: What We Wear Under There | Swain, Ruth Freeman | 6.2 | 0.5 |
| 115100 | Underwood See, The | Lawrence, Michael | 5.9 | 9.0 |
| 104793 | Underworld | MacPhail, Catherine | 3.6 | 7.0 |
| 105095 | Underworld | Watson, Jude | 4.7 | 4.0 |
| 104215 | Undine | Russon, Penni | 5.2 | 7.0 |
| 128869 | Undiscovered Country | Enger, Lin | 5.7 | 13.0 |
| 126459 | Undone | Taylor, Brooke | 4.7 | 12.0 |
| 101270 | Undone Fairy Tale, An | Lendler, Ian | 3.1 | 0.5 |
| 63819 | Uneasy Peace: 1945-1980, An | Blohm, Craig E. | 10.6 | 6.0 |
| 115352 | Uneversaurus | Potts, Professor | 3.7 | 0.5 |
| 84532 | Unexpected Development | Perez, Marlene | 4.4 | 5.0 |
| 57379 | Unexpected Letter, The | Stahl, Hilda | 4.0 | 4.0 |
| 78557 | Unexpected Magic: Collected Stories | Jones, Diana Wynne | 5.3 | 21.0 |
| 52832 | Unexpected Treasure | Dionetti, Michelle | 3.3 | 2.0 |
| 10399 | Unexpected Weapon, The | Griffith, Connie | 5.0 | 4.0 |
| 44727 | Unexpected, The | Applegate, K.A. | 3.6 | 3.0 |
| 112176 | Unexpected, The | Ribeiro, Nelson | 2.3 | 1.0 |
| 101894 | Unexpected: 11 Mysterious Stories | Williams, Laura E. | 4.5 | 9.0 |
| 107429 | Unexpectedly Bad Hair of Barcelona Smith, The | Graves, Keith | 2.9 | 0.5 |
| 132725 | Unfinished Angel, The | Creech, Sharon | 4.4 | 3.0 |
| 17268 | Unfinished Dreams | Zalben, Jane Breskin | 4.3 | 5.0 |
| 6947 | Unfinished Portrait of Jessica | Peck, Richard | 4.9 | 5.0 |
| 6947 | Unfinished Portrait of Jessica | Peck, Richard | 4.9 | 5.0 |
| 43817 | Unfinished Symphony | Andrews, V.C. | 5.0 | 16.0 |
| 66928 | Unforgettable Summer, The | Tada, Joni Eareckson | 5.0 | 3.0 |
| 115136 | Unforgettable: An It Girl Novel | von Ziegesar, Cecily | 5.9 | 9.0 |
| 77628 | Ungrateful Tiger, The | Ellis, Julie | 3.1 | 0.5 |
| 102035 | Unhappy Appy | Mackall, Dandi Daley | 4.1 | 4.0 |
| 129607 | Unhappy Medium | Kimmel, Elizabeth Cody | 4.9 | 5.0 |
| 10747 | Unheard Voices | Baer, Judy | 4.4 | 5.0 |
| 111383 | Unholy Crusade: The Ransacking of Medieval Constantinople, The | Lace, William W. | 9.3 | 4.0 |
| 125834 | UNICEF | Connolly, Sean | 7.8 | 1.0 |
| 72670 | UNICEF | Grahame, Deborah A. | 7.1 | 2.0 |
| 85426 | UNICEF | Maddocks, Steven | 8.5 | 2.0 |
| 56053 | UNICEF (Organizaciones de ayuda) | Suen, Anastasia | 3.1 | 0.5 |
| 56053 | UNICEF: United Nations Children's Fund | Suen, Anastasia | 3.1 | 0.5 |
| 128811 | Unicellular Organisms | Kite, L. Patricia | 6.2 | 1.0 |
| 105878 | Unicorn | Ray, Belinda | 4.3 | 3.0 |
| 21462 | Unicorn Dreams | Sheldon, Dyan | 3.1 | 0.5 |
| 80961 | Unicorn Treasury: Stories, Poems, and Unicorn Lore, The | Coville, Bruce | 5.5 | 6.0 |
| 133888 | Unicorn Uproar | Keene, Carolyn | 3.6 | 1.0 |
| 111745 | Unicorn Wings | Loehr, Mallory | 1.8 | 0.5 |
| 78926 | Unicorn, The | Rodda, Emily | 3.8 | 2.0 |
| 21815 | Unicornio del Oeste, El | Ada, Alma Flor | 4.2 | 0.5 |
| 20966 | unicornio y el mar, El | Moodie, Fiona | 4.3 | 0.5 |
| 51463 | Unicorns | Netzley, Patricia D. | 9.2 | 3.0 |
| 102052 | Unicorns | Penner, Lucille Recht | 3.7 | 0.5 |
| 80938 | Unicorns and Other Magical Creatures | Hamilton, John | 6.7 | 1.0 |
| 25630 | Unicorns at War, The | Johansson, Alice Nicole | 4.8 | 5.0 |
| 18749 | Unicorns Don't Give Sleigh Rides | Dadey, Debbie | 3.6 | 1.0 |
| 18749 | Unicorns Don't Give Sleigh Rides | Dadey, Debbie | 3.6 | 1.0 |
| 25648 | Unicorns Go Hawaiian, The | Suzanne, Jamie | 3.9 | 5.0 |
| 25629 | Unicorns in Love | Johansson, Alice Nicole | 4.3 | 4.0 |
| 41534 | Unicorns! Unicorns! | McCaughrean, Geraldine | 4.0 | 0.5 |
| 114863 | Unicorns? Get Real! | Lasky, Kathryn | 5.0 | 4.0 |
| 8994 | Unidentified Flying Objects | Collins, Jim | 5.9 | 1.0 |
| 17497 | Unidentified Flying Objects and Extra Terrestrial Life | Marsh, Carole | 8.6 | 2.0 |
| 20968 | uniforme maldito, El | Cedar, Sally | 4.5 | 0.5 |
| 108753 | Uniforms Through History | McDonald, Fiona | 7.6 | 1.0 |
| 86553 | Unifying Force, The | Luceno, James | 8.8 | 31.0 |
| 120799 | Uninvited | Marrone, Amanda | 4.6 | 7.0 |
| 18699 | Uninvited Guest and Other Jewish Holiday Tales, The | Jaffe, Nina | 6.0 | 2.0 |
| 57380 | Uninvited Guests, The | Stahl, Hilda | 3.9 | 4.0 |
| 130141 | Uninvited, The | Wynne-Jones, Tim | 4.4 | 11.0 |
| 36097 | Union and the Civil War in American History, The | Hull, Mary E. | 9.2 | 4.0 |
| 10445 | Union Belle, The | Morris, Gilbert | 5.8 | 18.0 |
| 128066 | Union General and 18th President: Ulysses S. Grant | Englar, Mary | 6.0 | 1.0 |
| 69849 | Union Generals | Head, Tom | 8.8 | 2.0 |
| 21140 | Union Generals of the Civil War | Green, Carl R. | 6.5 | 3.0 |
| 108839 | Union Soldier, The | Rebman, Renée C. | 6.4 | 1.0 |
| 69850 | Union Soldiers | Dunn, John | 8.0 | 1.0 |
| 81232 | Union Victory (July 1863-1865), The | Anderson, Dale | 8.0 | 2.0 |
| 84707 | Unique Animals of Alaska | Stone, Tanya Lee | 4.7 | 0.5 |
| 84708 | Unique Animals of Hawaii | Stone, Tanya Lee | 4.4 | 0.5 |
| 85930 | Unique Animals of the Islands | Stone, Tanya Lee | 4.6 | 0.5 |
| 84709 | Unique Animals of the Midwest | Stone, Tanya Lee | 4.5 | 0.5 |
| 85931 | Unique Animals of the Mountains and Prairies | Stone, Tanya Lee | 4.6 | 0.5 |
| 85932 | Unique Animals of the Northeast | Stone, Tanya Lee | 4.5 | 0.5 |
| 84710 | Unique Animals of the Pacific Coast | Stone, Tanya Lee | 4.5 | 0.5 |
| 87135 | Unique Animals of the South | Stone, Tanya Lee | 4.4 | 0.5 |
| 84711 | Unique Animals of the Southeast | Stone, Tanya Lee | 4.9 | 0.5 |
| 85933 | Unique Animals of the Southwest | Stone, Tanya Lee | 4.4 | 0.5 |
| 74821 | Unique Monique | Rousaki, Maria | 3.2 | 0.5 |
| 89116 | Unique Places | Harper, Judith | 4.9 | 0.5 |
| 118861 | Unique Soul Weird World (Home Run) | Berman, Ron | 5.4 | 2.0 |
| 118862 | Unique Soul Weird World (Touchdown) | Berman, Ron | 6.7 | 2.0 |
| 76180 | Uniquely Alabama | Wilson, Martin | 7.1 | 1.0 |
| 82962 | Uniquely Alaska | Henry, Judy | 7.1 | 1.0 |
| 76181 | Uniquely Arizona | Corrick, James A. | 6.6 | 1.0 |
| 80952 | Uniquely Arkansas | Dougan, Michael B. | 7.5 | 1.0 |
| 68861 | Uniquely California | Feinstein, Stephen | 7.2 | 1.0 |
| 133108 | Uniquely California (Revised Edition) | Feinstein, Stephen | 7.1 | 1.0 |
| 75054 | Uniquely Colorado | Bograd, Larry | 7.0 | 1.0 |
| 75055 | Uniquely Connecticut | Goldstein, Phyllis | 6.9 | 1.0 |
| 79042 | Uniquely Delaware | Moose, Katherine B. | 7.2 | 1.0 |
| 66859 | Uniquely Florida | Knotts, Bob | 6.3 | 1.0 |
| 78597 | Uniquely Georgia | Bograd, Larry | 6.9 | 1.0 |
| 80906 | Uniquely Hawaii | Goh, Geok Yian | 7.3 | 1.0 |
| 82963 | Uniquely Idaho | Boone, Mary | 7.2 | 1.0 |
| 66860 | Uniquely Illinois | Santella, Andrew | 6.1 | 1.0 |
| 75056 | Uniquely Indiana | Ross, D.J. | 7.1 | 1.0 |
| 80953 | Uniquely Iowa | Horton, Loren N. | 7.3 | 1.0 |
| 82964 | Uniquely Kansas | Bograd, Larry | 6.9 | 1.0 |
| 78598 | Uniquely Kentucky | Becker, Maki | 7.1 | 1.0 |
| 75057 | Uniquely Louisiana | Loughran, Donna | 6.8 | 1.0 |
| 79043 | Uniquely Maine | Ross, D.J. | 6.8 | 1.0 |
| 76182 | Uniquely Maryland | Leese, Jennifer | 7.3 | 1.0 |
| 78599 | Uniquely Massachusetts | Domblewski, Carol | 6.2 | 1.0 |
| 76194 | Uniquely Michigan | Thieda, Nichole | 7.2 | 1.0 |
| 76183 | Uniquely Minnesota | Ash, Stephanie | 6.5 | 1.0 |
| 80907 | Uniquely Mississippi | Wilson, Martin | 6.9 | 1.0 |
| 76184 | Uniquely Missouri | Owens, Lisa | 6.9 | 1.0 |
| 78600 | Uniquely Montana | Boone, Mary | 7.3 | 1.0 |
| 80908 | Uniquely Nebraska | Opat, Jamie Stockman | 8.2 | 1.0 |
| 80909 | Uniquely Nevada | O'Connor, Rebecca | 7.3 | 1.0 |
| 79044 | Uniquely New Hampshire | Melman, Peter | 7.4 | 1.0 |
| 74283 | Uniquely New Jersey | Stewart, Mark | 7.0 | 1.0 |
| 78622 | Uniquely New Mexico | Hubbard, Coleen | 7.2 | 1.0 |
| 86848 | Uniquely New York | Stewart, Mark | 7.4 | 1.0 |
| 79045 | Uniquely North Carolina | McClellan, Adam | 7.2 | 1.0 |
| 79046 | Uniquely North Dakota | Redmond, Jim | 7.0 | 1.0 |
| 69657 | Uniquely Ohio | Schonberg, Marcia | 6.8 | 1.0 |
| 133109 | Uniquely Ohio (Revised Edition) | Schonberg, Marcia | 6.7 | 1.0 |
| 82043 | Uniquely Oklahoma | Anderson, Reuben | 7.0 | 1.0 |
| 80954 | Uniquely Oregon | Boone, Mary | 7.7 | 1.0 |
| 75058 | Uniquely Pennsylvania | McCulloch, Susan H. | 6.6 | 1.0 |
| 81628 | Uniquely Rhode Island | Moose, Katherine | 7.5 | 1.0 |
| 82965 | Uniquely South Carolina | Sherrow, Victoria | 6.7 | 1.0 |
| 82044 | Uniquely South Dakota | Anderson, Reuben | 7.0 | 1.0 |
| 78601 | Uniquely Tennessee | McClellan, Adam | 7.1 | 1.0 |
| 76561 | Uniquely Texas | Wade, Mary Dodson | 6.9 | 1.0 |
| 79047 | Uniquely Utah | Dumas, Bianca | 7.0 | 1.0 |
| 82966 | Uniquely Vermont | Raabe, Emily | 7.0 | 1.0 |
| 69746 | Uniquely Virginia | Smith, Karla | 7.1 | 1.0 |
| 78602 | Uniquely Washington | Johns, Linda | 6.7 | 1.0 |
| 82967 | Uniquely West Virginia | Cribben, Patrick | 8.2 | 1.0 |
| 76185 | Uniquely Wisconsin | Steele, Christy Lee | 6.9 | 1.0 |
| 81629 | Uniquely Wyoming | Bograd, Larry | 7.0 | 1.0 |
| 36648 | Unit of Water, a Unit of Time, A | Whynott, Douglas | 6.9 | 16.0 |
| 102286 | Unitarian | Hughes, Morgan | 8.9 | 1.0 |
| 128631 | Unite or Die: How Thirteen States Became a Nation | Jules, Jacqueline | 5.3 | 0.5 |
| 74803 | United Arab Emirates | Augustin, Byron | 8.1 | 4.0 |
| 130377 | United Arab Emirates | Bryan, Antonia D. | 5.1 | 0.5 |
| 83860 | United Arab Emirates | Miller, Debra A. | 11.1 | 5.0 |
| 122046 | United Arab Emirates (2nd Edition) | King, David C. | 9.3 | 4.0 |
| 121224 | United Arab Emirates (Second Series) | Sonneborn, Liz | 7.5 | 3.0 |
| 126317 | United Force, A | O'Donnell, Liam | 3.4 | 0.5 |
| 134512 | United in Cause: The Sons of Liberty | Nardo, Don | 7.7 | 1.0 |
| 2402 | United in Freedom | Lynch, Marcia | 3.6 | 2.0 |
| 2402 | United in Freedom | Lynch, Marcia | 3.6 | 2.0 |
| 122320 | United Kingdom | Bean, Rachel | 7.0 | 2.0 |
| 82242 | United Kingdom | Mattern, Joanne | 6.2 | 1.0 |
| 114871 | United Kingdom (Freestyle Express) | Bowden, Rob | 4.3 | 1.0 |
| 109330 | United Kingdom (Freestyle) | Bowden, Rob | 7.1 | 1.0 |
| 77901 | United Kingdom in Pictures (Second Series) | Campbell, Kumari | 9.8 | 3.0 |
| 124763 | United Kingdom Today, The | Gallagher, Michael | 8.5 | 2.0 |
| 85798 | United Kingdom, The | Bowden, Rob | 8.4 | 2.0 |
| 28722 | United Kingdom, The | Flint, David | 8.7 | 1.0 |
| 80629 | United Kingdom, The | Walsh, Kieran | 5.9 | 0.5 |
| 5599 | United Nations | Greene, Carol | 4.3 | 0.5 |
| 85427 | United Nations | Ross, Stewart | 8.4 | 2.0 |
| 72671 | United Nations | Tarsitano, Frank | 8.2 | 2.0 |
| 5599 | United Nations | Greene, Carol | 4.3 | 0.5 |
| 24714 | United Nations - Peacekeeper? | Johnson, Edward | 9.5 | 1.0 |
| 65342 | United Nations Keeping the Peace | Connolly, Sean | 10.2 | 3.0 |
| 13496 | United Nations, The | Armbruster, Ann | 8.6 | 1.0 |
| 125832 | United Nations, The | Connolly, Sean | 8.3 | 1.0 |
| 25164 | United Nations, The | Stein, R. Conrad | 8.1 | 1.0 |
| 50221 | United Nations: Its History and the Canadians Who Shaped It, The | Morton, Desmond | 8.5 | 3.0 |
| 103628 | United No More! Stories of the Civil War | Rappaport, Doreen | 5.7 | 3.0 |
| 57037 | United States | Hartman, Adrienne | 6.3 | 1.0 |
| 76123 | United States ABCs: A Book About the People and Places of the United States, The | Schroeder, Holly | 5.1 | 0.5 |
| 72463 | United States Air Force | Hopkins, Ellen | 6.9 | 1.0 |
| 121323 | United States Air Force | Zobel, Derek | 4.6 | 0.5 |
| 24064 | United States Air Force, The | Green, Michael | 4.8 | 0.5 |
| 24064 | United States Air Force, The | Green, Michael | 4.8 | 0.5 |
| 72464 | United States Army | Bartlett, Richard | 7.2 | 1.0 |
| 121324 | United States Army | David, Jack | 4.1 | 0.5 |
| 24065 | United States Army, The | Green, Michael | 5.5 | 0.5 |
| 24065 | United States Army, The | Green, Michael | 5.5 | 0.5 |
| 125380 | United States Capitol, The | Karapetkova, Holly | 7.0 | 0.5 |
| 89164 | United States Capitol, The | Silate, Jennifer | 5.3 | 0.5 |
| 121325 | United States Coast Guard | David, Jack | 4.2 | 0.5 |
| 78349 | United States Coast Guard | Lurch, Bruno | 6.9 | 1.0 |
| 4577 | United States Coast Guard, The | Green, Michael | 5.4 | 0.5 |
| 60069 | United States Coins | Ferraro, Bonita | 4.5 | 0.5 |
| 73031 | United States Constitution and Early State Constitutions: Law and Order in t, Th | Cefrey, Holly | 5.8 | 0.5 |
| 57708 | United States Constitution, The | Leebrick, Kristal | 6.9 | 1.0 |
| 73885 | United States Constitution, The | Price Hossell, Karen | 8.1 | 1.0 |
| 65113 | United States Enters the World Stage: 1867-1919, The | Collier, Christopher | 8.8 | 3.0 |
| 121073 | United States Flag, The | Tourville, Amanda Doering | 3.8 | 0.5 |
| 29929 | United States from A to Z, The | Kalman, Bobbie | 5.4 | 0.5 |
| 16794 | United States Holocaust Memorial Museum, The | Brooks, Philip | 7.0 | 1.0 |
| 116415 | United States in Pictures (Second Series) | Streissguth, Tom | 8.1 | 3.0 |
| 65114 | United States in the Cold War: 1945-1989, The | Collier, Christopher | 9.5 | 3.0 |
| 65115 | United States in World War II: 1941-1945, The | Collier, Christopher | 8.6 | 3.0 |
| 68209 | United States Justice System, The | Dupont, Ellen | 9.7 | 3.0 |
| 121326 | United States Marine Corps | David, Jack | 4.6 | 0.5 |
| 78350 | United States Marine Corps | Lurch, Bruno | 7.1 | 1.0 |
| 24066 | United States Marine Corps, The | Green, Michael | 5.7 | 1.0 |
| 24066 | United States Marine Corps, The | Green, Michael | 5.7 | 1.0 |
| 2077 | United States Marshals Service | Green, Michael | 5.6 | 0.5 |
| 78351 | United States Navy | Bartlett, Richard | 5.8 | 1.0 |
| 121327 | United States Navy | David, Jack | 4.2 | 0.5 |
| 24067 | United States Navy, The | Green, Michael | 5.1 | 0.5 |
| 24067 | United States Navy, The | Green, Michael | 5.1 | 0.5 |
| 76922 | United States of America | Hintz, Martin | 8.1 | 3.0 |
| 54403 | United States of America | Petersen, Christine | 5.6 | 0.5 |
| 121225 | United States of America (Second Series) | Burgan, Michael | 7.5 | 3.0 |
| 63581 | United States Region by Region, The | Kummer, Patricia K. | 5.8 | 1.0 |
| 76889 | United States Supreme Court, The | Britton, Tamara L. | 5.7 | 0.5 |
| 100286 | United States Territories | Thompson, Linda | 8.0 | 1.0 |
| 36109 | United States v. Amistad: Rebellion on a Slave Ship | Freedman, Suzanne | 9.5 | 3.0 |
| 127244 | United States v. Amistad: Slave Ship Mutiny | Gold, Susan Dudley | 9.6 | 5.0 |
| 16845 | United States v. Nixon: Watergate and the President | Herda, D.J. | 8.1 | 3.0 |
| 73065 | United States v. the Amistad: The Question of Slavery in a Free Country | Hulm, David | 8.5 | 2.0 |
| 36088 | United States v. Virginia: Virginia Military Institute Accepts Women | Long, Barbara | 10.3 | 3.0 |
| 15398 | United States, The | Allard, Denise | 3.1 | 0.5 |
| 28723 | United States, The | Baines, John | 7.3 | 1.0 |
| 75744 | United States, The | Doak, Robin S. | 5.4 | 0.5 |
| 63082 | United States, The | Italia, Bob | 5.3 | 0.5 |
| 2595 | United States, The | Stevens, Kathryn | 5.5 | 0.5 |
| 51601 | United States, The | Webb, Marcus | 11.4 | 5.0 |
| 26175 | United States...in Pictures | Geography-Department | 9.3 | 2.0 |
| 112447 | United States: A Question and Answer Book, The | Spengler, Kremena | 4.9 | 0.5 |
| 62762 | United Tates of America | Danziger, Paula | 4.4 | 4.0 |
| 62762 | United Tates of America | Danziger, Paula | 4.4 | 4.0 |
| 120564 | United Tweets of America: 50 State Birds: Their Stories, Their Glories | Talbott, Hudson | 4.9 | 1.0 |
| 61415 | United Way, The | Craats, Rennay | 7.5 | 1.0 |
| 57303 | United We Stand | Louis, Nancy | 7.2 | 1.0 |
| 87544 | Universe | Kerrod, Robin | 7.8 | 1.0 |
| 84533 | Universe on a T-Shirt: The Quest for the Theory of Everything | Falk, Dan | 10.5 | 12.0 |
| 72649 | Universe, The | Ball, Jackie | 6.9 | 2.0 |
| 40886 | Universe, The | Davies, Francis | 5.7 | 0.5 |
| 48751 | Universe, The | Farndon, John | 6.4 | 0.5 |
| 32977 | Universe, The | Saunders-Smith, Gail | 4.5 | 0.5 |
| 25261 | Universe, The | Simon, Seymour | 5.5 | 0.5 |
| 40238 | Universe, The | Time-Life Editors | 7.7 | 2.0 |
| 45838 | Universe, The | World Book Editors | 6.0 | 2.0 |
| 25261 | Universe, The | Simon, Seymour | 5.5 | 0.5 |
| 22958 | universo (Origen y evolución), El | Miotto, Enrico | 6.6 | 1.0 |
| 45971 | universo, El | Vaughan, Richard | 1.6 | 0.5 |
| 75540 | Univited Guests | Eggleton, Jill | 4.9 | 0.5 |
| 18398 | unión más perfecta, Una | Maestro, Betsy | 5.7 | 1.0 |
| 43632 | Unknown | Thompson, Colin | 4.0 | 0.5 |
| 25046 | Unknown Priestess, The | Williams, Jeff | 4.9 | 5.0 |
| 18995 | Unknown, The | Applegate, K.A. | 4.0 | 4.0 |
| 130441 | Unknowns, The | Carey, Benedict | 5.3 | 8.0 |
| 31522 | Unleashed in Space | Steele, Alexander | 5.6 | 8.0 |
| 65928 | Unless | Shields, Carol | 7.4 | 12.0 |
| 110890 | Unlikely Friendship: A Novel of Mary Todd Lincoln and Elizabeth Keckley, An | Rinaldi, Ann | 4.6 | 8.0 |
| 17848 | Unlikely Romance of Kate Bjorkman, The | Plummer, Louise | 5.0 | 6.0 |
| 55843 | Unlovable | Yaccarino, Dan | 2.7 | 0.5 |
| 101660 | Unlucky for Some: A Novel of Suspense | McGown, Jill | 5.9 | 19.0 |
| 40109 | Unlucky Number Mystery, The | Wright, Bob | 2.4 | 0.5 |
| 40109 | Unlucky Number Mystery, The | Wright, Bob | 2.4 | 0.5 |
| 32923 | Unlucky Pony | Betancourt, Jeanne | 3.5 | 1.0 |
| 117806 | Unmaking of Duncan Veerick, The | Levin, Betty | 4.3 | 7.0 |
| 112397 | Unmanned Aerial Vehicles | Cain, Bill | 6.3 | 1.0 |
| 104765 | Unmasked by Doctor Octopus! | Dezago, Todd | 2.7 | 0.5 |
| 45023 | Unmasking of 'Ksan, The | Wilson, Eric | 4.3 | 5.0 |
| 125108 | Unnameables, The | Booraem, Ellen | 4.8 | 10.0 |
| 43311 | Unnatural Exposure | Cornwell, Patricia | 5.6 | 14.0 |
| 123777 | Unnatural Inquirer, The | Green, Simon R. | 5.6 | 9.0 |
| 44618 | Uno más | Martínez i Vendrell, Maria | 3.3 | 0.5 |
| 110348 | Uno's Garden | Base, Graeme | 3.8 | 0.5 |
| 127224 | Uno: Blue-Ribbon Beagle | Spinner, Stephanie | 2.9 | 0.5 |
| 115470 | Unplugged | Crouch, Cheryl | 4.0 | 4.0 |
| 54394 | Unpredictable | Kindig, Tess | 4.7 | 4.0 |
| 25067 | Unprotected Witness, The | Stevenson, James | 3.6 | 4.0 |
| 124852 | Unraveling | Baldini, Michelle | 4.5 | 7.0 |
| 133613 | Unraveling the History of Mummies Around the World | Branzei, Sylvia | 5.0 | 0.5 |
| 88787 | Unremarkable Boy and a Rather Remarkable Ghost, An | Arnold, Louise | 5.8 | 9.0 |
| 109162 | UnResolved, The | Welsh, T.K. | 4.5 | 5.0 |
| 110286 | Unrivalled Spangles, The | Wallace, Karen | 4.4 | 8.0 |
| 79161 | Unscripted | Kaye, Amy | 5.0 | 7.0 |
| 133774 | Unseen Academicals | Pratchett, Terry | 5.7 | 21.0 |
| 74166 | Unseen Companion | Orenstein, Denise Gosliner | 5.9 | 14.0 |
| 15814 | Unseen Powers | Sumner, M.C. | 5.0 | 7.0 |
| 59593 | Unseen Rainbows, Silent Songs: The World Beyond Human Senses | Goodman, Susan E. | 5.4 | 1.0 |
| 78204 | Unseen, The | Snyder, Zilpha Keatley | 6.1 | 8.0 |
| 78204 | Unseen, The | Snyder, Zilpha Keatley | 6.1 | 8.0 |
| 49519 | Unseen: Scary Stories, The | Lunn, Janet | 5.1 | 5.0 |
| 17399 | Unsers, The | Bentley, Karen | 6.0 | 2.0 |
| 126115 | Unsettled: The Problem of Loving Israel | Aronson, Marc | 8.3 | 8.0 |
| 103626 | Unsigned Valentine: And Other Events in the Life of Emma Meade, The | Hurwitz, Johanna | 5.2 | 4.0 |
| 62841 | Unsinkable! | Brimner, Larry Dane | 2.3 | 0.5 |
| 116643 | Unsolved Celebrity Mysteries | Southwell, David | 9.5 | 2.0 |
| 133211 | Unsolved Crimes | Townsend, John | 5.4 | 1.0 |
| 116644 | Unsolved Extraterrestrial Mysteries | Southwell, David | 9.9 | 2.0 |
| 116645 | Unsolved Political Mysteries | Southwell, David | 9.8 | 2.0 |
| 120798 | Unspoken, The | Fahy, Thomas | 4.6 | 7.0 |
| 84408 | Unsuspecting Gourmet, The | Rabb, M.E. | 4.4 | 6.0 |
| 78083 | Untamed | Farley, Terri | 5.1 | 6.0 |
| 53292 | Untamed Land, An | Snelling, Lauraine | 5.4 | 19.0 |
| 126278 | Untamed: A House of Night Novel | Cast, P.C. | 5.2 | 15.0 |
| 126278 | Untamed: A House of Night Novel | Cast, P.C. | 5.2 | 15.0 |
| 106321 | Untelling, The | Jones, Tayari | 5.1 | 12.0 |
| 85409 | Unthinkable Thoughts of Jacob Green: A Novel, The | Braff, Joshua | 4.3 | 10.0 |
| 20647 | Until Angels Close My Eyes | McDaniel, Lurlene | 4.0 | 5.0 |
| 20647 | Until Angels Close My Eyes | McDaniel, Lurlene | 4.0 | 5.0 |
| 65729 | Until the Christ Child Came | Mackall, Dandi Daley | 3.0 | 0.5 |
| 49960 | Until Tomorrow | Gunn, Robin Jones | 5.6 | 12.0 |
| 40010 | Until We Got Princess | Thomas, Rob | 1.7 | 0.5 |
| 123309 | Until We Meet Again | Jones, Susan | 3.7 | 0.5 |
| 78149 | Until We Meet Again | Schraff, Anne | 4.8 | 4.0 |
| 8596 | Until Whatever | Humphreys, Martha | 3.6 | 4.0 |
| 7861 | Untold Tales | Brooke, William | 5.8 | 4.0 |
| 114428 | Untouchable | Brian, Kate | 4.5 | 7.0 |
| 112655 | Unusual Animals | Lambilly-Bresson, Elisabeth de | 1.6 | 0.5 |
| 74041 | Unusual Birds | Couzens, Dominic | 9.2 | 7.0 |
| 119087 | Unusual Birds | Dineen, Jacqueline | 2.6 | 0.5 |
| 119359 | Unusual Buildings | Parker, Anne-Marie | 3.6 | 0.5 |
| 80546 | Unusual Farms | Haugen, Brenda | 4.0 | 0.5 |
| 27083 | Unusual Friendships | Brimner, Larry Dane | 6.9 | 1.0 |
| 61999 | Unusual Friendships | Moisonier, Beatrice Culleton | 4.6 | 0.5 |
| 64886 | Unusual Heroes | Peacock, Shane | 7.5 | 13.0 |
| 35859 | Unusual Machines | Sloan, Peter | 2.8 | 0.5 |
| 133815 | Unusual Mind of Vincent Shadow, The | Kehoe, Tim | 4.6 | 3.0 |
| 34667 | Unusual Show, An | Blonder, Ellen | 1.7 | 0.5 |
| 57012 | Unvanquished, The | Faulkner, William | 6.1 | 11.0 |
| 105565 | Unvisibles, The | Whybrow, Ian | 6.1 | 7.0 |
| 105565 | Unvisibles, The | Whybrow, Ian | 6.1 | 7.0 |
| 85300 | Unwelcome Guests | Miller, Gary | 3.3 | 0.5 |
| 77275 | Unwilling Umpire, The | Roy, Ron | 3.5 | 1.0 |
| 77275 | Unwilling Umpire, The | Roy, Ron | 3.5 | 1.0 |
| 32691 | Unwilling Witch, The | Lubar, David | 3.5 | 3.0 |
| 120008 | Unwind | Shusterman, Neal | 5.0 | 14.0 |
| 103507 | Unwitting Wisdom: An Anthology of Aesop's Fables | Ward, Helen | 6.3 | 1.0 |
| 111174 | Up | LaMarche, Jim | 3.0 | 0.5 |
| 7699 | Up & Down Spring, The | Hurwitz, Johanna | 4.2 | 2.0 |
| 7699 | Up & Down Spring, The | Hurwitz, Johanna | 4.2 | 2.0 |
| 46330 | Up a Creek | Williams, Laura E. | 4.6 | 4.0 |
| 46241 | Up a Rainforest Tree | Telford, Carol | 4.9 | 0.5 |
| 249 | Up a Road Slowly | Hunt, Irene | 6.6 | 8.0 |
| 249 | Up a Road Slowly | Hunt, Irene | 6.6 | 8.0 |
| 249 | Up a Road Slowly | Hunt, Irene | 6.6 | 8.0 |
| 20756 | Up All Night | Michaels, Karen | 4.5 | 5.0 |
| 75657 | Up All Night | Ostrow, Kim | 2.9 | 0.5 |
| 110955 | Up All Night Counting: A Pop-up Book | Koontz, Robin | 1.3 | 0.5 |
| 124507 | Up All Night: A Short Story Collection | Abrahams, Peter | 4.6 | 5.0 |
| 88582 | Up and at 'Em with Winnie & Ernst | Freschet, Gina | 3.3 | 0.5 |
| 36190 | Up and Away | Coupe, Robert | 4.9 | 0.5 |
| 40011 | Up and Away! Taking a Flight | Davis, Meredith | 4.8 | 0.5 |
| 49928 | Up and Away, Reptar! | Willson, Sarah | 2.1 | 0.5 |
| 50319 | Up and Down | Hughes, Monica | 0.3 | 0.5 |
| 112285 | Up and Down | Johnson, Tami | 2.7 | 0.5 |
| 56970 | Up and Down | Murphy, Patricia J. | 2.1 | 0.5 |
| 32228 | Up and Down | Nelson, May | 0.5 | 0.5 |
| 127321 | Up and down the Andes: A Peruvian Festival Tale | Krebs, Laurie | 6.4 | 0.5 |
| 125605 | Up and Down the Scratchy Mountains | Snyder, Laurel | 4.8 | 7.0 |
| 59799 | Up and Down with Kate | Chorao, Kay | 1.7 | 0.5 |
| 106322 | Up and Running: The Inspiring True Story of a Boy's Struggle to Survive and Triu | Patinkin, Mark | 5.0 | 15.0 |
| 105282 | Up Before Daybreak: Cotton and People In America | Hopkinson, Deborah | 7.0 | 3.0 |
| 82454 | Up Close: A Chapter Book | Gikow, Louise A. | 4.8 | 0.5 |
| 128276 | Up Close: Babe Ruth | Hampton, Wilborn | 6.8 | 6.0 |
| 127004 | Up Close: Bill Gates | Aronson, Marc | 7.9 | 5.0 |
| 120398 | Up Close: Ella Fitzgerald | Stone, Tanya Lee | 7.6 | 5.0 |
| 115274 | Up Close: Elvis Presley | Hampton, Wilborn | 7.0 | 5.0 |
| 117990 | Up Close: Frank Lloyd Wright | Adkins, Jan | 8.6 | 9.0 |
| 129294 | Up Close: Harper Lee | Madden, Kerry | 7.5 | 5.0 |
| 123882 | Up Close: Jane Goodall | Bardhan-Quallen, Sudipta | 8.3 | 6.0 |
| 120458 | Up Close: John Steinbeck | Meltzer, Milton | 7.6 | 6.0 |
| 114228 | Up Close: Johnny Cash | Neimark, Anne E. | 7.5 | 5.0 |
| 114229 | Up Close: Oprah Winfrey | Cooper, Ilene | 7.6 | 5.0 |
| 114230 | Up Close: Rachel Carson | Levine, Ellen | 8.3 | 6.0 |
| 113958 | Up Close: Robert F. Kennedy | Aronson, Marc | 8.0 | 6.0 |
| 124703 | Up Close: Ronald Reagan | Sutherland, James | 8.4 | 7.0 |
| 131367 | Up Close: Theodore Roosevelt | Cooper, Michael L. | 8.7 | 6.0 |
| 123163 | Up Close: Thurgood Marshall | Crowe, Chris | 9.4 | 7.0 |
| 127762 | Up Close: W.E.B. Du Bois | Bolden, Tonya | 8.2 | 5.0 |
| 75288 | Up Cloudy Mountain | Gabolinscy, Jack | 4.1 | 0.5 |
| 43270 | Up Country | Carter, Alden R. | 4.1 | 10.0 |
| 5047 | Up from Jericho Tel | Konigsburg, E.L. | 6.0 | 5.0 |
| 5047 | Up from Jericho Tel | Konigsburg, E.L. | 6.0 | 5.0 |
| 549 | Up from Slavery | Washington, Booker T. | 8.2 | 13.0 |
| 549 | Up from Slavery | Washington, Booker T. | 8.2 | 13.0 |
| 12055 | Up Goes Mr. Downs | Smath, Jerry | 2.1 | 0.5 |
| 48161 | Up Goes the Skyscraper! | Gibbons, Gail | 4.1 | 0.5 |
| 122082 | Up in Heaven | Chichester Clark, Emma | 2.4 | 0.5 |
| 61427 | Up in the Air | Ardagh, Philip | 2.5 | 0.5 |
| 15540 | Up in the Air: The Story of Bessie Coleman | Hart, Philip S. | 6.2 | 2.0 |
| 40116 | Up in the Clouds | Blackfield, Neil | 3.3 | 0.5 |
| 60670 | Up Molasses Mountain | Baker, Julie | 4.4 | 6.0 |
| 115565 | Up North and Down South: Using Map Directions | Gonzales, Doreen | 3.3 | 0.5 |
| 6097 | Up North at the Cabin | Chall, Marsha | 3.8 | 0.5 |
| 7400 | Up North in Winter | Hartley, Deborah | 2.8 | 0.5 |
| 61281 | Up on Cloud Nine | Fine, Anne | 4.6 | 5.0 |
| 61281 | Up on Cloud Nine | Fine, Anne | 4.6 | 5.0 |
| 108368 | Up on Daddy's Shoulders | Berry, Matt | 2.4 | 0.5 |
| 40117 | Up Rattler Mountain | Schraff, Anne | 4.2 | 1.0 |
| 65074 | Up the Chimney | Hodges, Margaret | 3.4 | 0.5 |
| 10047 | Up the Down Staircase | Kaufman, Bel | 5.9 | 9.0 |
| 40012 | Up the Haystack | Moss, Sally | 2.6 | 0.5 |
| 40118 | Up the Hill | Sims, Matt | 2.0 | 0.5 |
| 40118 | Up the Hill | Sims, Matt | 2.0 | 0.5 |
| 86473 | Up the Hill and Down: Poems for the Very Young | Smith, William Jay | 4.1 | 0.5 |
| 73735 | Up the Learning Tree | Vaughan, Marcia | 3.4 | 0.5 |
| 73735 | Up the Learning Tree | Vaughan, Marcia | 3.4 | 0.5 |
| 43633 | Up the Mountain | Agell, Charlotte | 1.2 | 0.5 |
| 4034 | Up the Path | Hofmeister, Alan M. | 0.8 | 0.5 |
| 115415 | Up the President's Nose | Nickel, Scott | 3.2 | 0.5 |
| 5394 | Up to Bat | Hughes, Dean | 4.2 | 2.0 |
| 5394 | Up to Bat | Hughes, Dean | 4.2 | 2.0 |
| 8098 | Up to Low | Doyle, Brian | 5.0 | 3.0 |
| 49731 | Up to the Plate: The All American Girls Professional Baseball League | Galt, Margot Fortunato | 7.6 | 3.0 |
| 4029 | Up We Go | Hofmeister, Alan M. | 0.7 | 0.5 |
| 87668 | Up! | George, Kristine O'Connell | 0.8 | 0.5 |
| 103820 | Up, Down, All Around: A Story of Gravity | Bailey, Jacqui | 4.9 | 0.5 |
| 120282 | Up, up in the Air | Blaisdell, Molly | 2.9 | 0.5 |
| 105033 | Up, Up, and Away | Catala, Ellen | 3.1 | 0.5 |
| 9395 | Up, Up, and Away | Hillert, Margaret | 1.4 | 0.5 |
| 130135 | Up, Up, and Away | Wadsworth, Ginger | 4.6 | 0.5 |
| 51685 | Up, Up, Down | Munsch, Robert N. | 2.1 | 0.5 |
| 106195 | Up, Up, Up! It's Apple-Picking Time | Shapiro, Jody Fickes | 3.3 | 0.5 |
| 20297 | Upchuck and the Rotten Willy | Wallace, Bill | 3.7 | 3.0 |
| 20297 | Upchuck and the Rotten Willy | Wallace, Bill | 3.7 | 3.0 |
| 46981 | Upchuck and the Rotten Willy: Running Wild | Wallace, Bill | 3.8 | 2.0 |
| 20298 | Upchuck and the Rotten Willy: The Great Escape | Wallace, Bill | 3.4 | 3.0 |
| 20298 | Upchuck and the Rotten Willy: The Great Escape | Wallace, Bill | 3.4 | 3.0 |
| 11299 | Update on Crime | Keene, Carolyn | 5.6 | 5.0 |
| 15341 | Update: Aids | McCauslin, Mark | 7.1 | 1.0 |
| 15342 | Update: Date Rape | Bandon, Alexandra | 6.3 | 1.0 |
| 15343 | Update: Drinking and Driving | Crisfield, Deborah | 7.0 | 1.0 |
| 15344 | Update: Drug Use and Abuse | Almonte, Paul | 8.5 | 1.0 |
| 15345 | Update: Eating Disorders | Crisfield, Deborah | 6.1 | 1.0 |
| 15346 | Update: Gun Control | Almonte, Paul | 7.8 | 1.0 |
| 15347 | Update: Homelessness | McCauslin, Mark | 6.2 | 1.0 |
| 15348 | Update: Street Gangs | Almonte, Paul | 6.8 | 1.0 |
| 15898 | Uphill Climb, An | Sargent, Dave | 5.5 | 10.0 |
| 63449 | Uplink from the Underground | Jenkins, Jerry B. | 4.5 | 4.0 |
| 134279 | Upon Secrecy | Castrovilla, Selene | 5.5 | 1.0 |
| 394 | Upon the Head of the Goat | Siegal, Aranka | 5.5 | 10.0 |
| 394 | Upon the Head of the Goat | Siegal, Aranka | 5.5 | 10.0 |
| 131009 | Upper Coastal Plain | Bennett, Doraine | 3.1 | 0.5 |
| 57320 | Upper Limbs: Learning How We Use Our Arms, Elbows, Forearms, and Hands, The | Sherman, Josepha | 8.0 | 1.0 |
| 116703 | Uppers: Stimulant Abuse | Brezina, Corona | 8.7 | 1.0 |
| 117966 | Uprising | Haddix, Margaret Peterson | 5.6 | 14.0 |
| 42028 | Uprising at Dawn | Roddy, Lee | 5.7 | 7.0 |
| 43696 | Ups and Downs of Simpson Snail, The | Himmelman, John | 2.1 | 0.5 |
| 9696 | Ups and Downs with Lion and Lamb | Brenner, Barbara | 2.2 | 0.5 |
| 85640 | Ups and Downs: A Book About the Stock Market | Loewen, Nancy | 4.0 | 0.5 |
| 114445 | Upsetting Annie | Mackall, Dandi Daley | 3.7 | 4.0 |
| 44068 | Upside Down Boy, The | Herrera, Juan Felipe | 3.1 | 0.5 |
| 44068 | Upside Down Boy, The | Herrera, Juan Felipe | 3.1 | 0.5 |
| 34881 | Upside-Down Cake | Carrick, Carol | 3.8 | 1.0 |
| 46194 | Upside-Down Day, The | Lewis, Beverly | 2.8 | 1.0 |
| 31129 | Upside-Down Reader, The | Gruber, Wilhelm | 2.8 | 0.5 |
| 19185 | Upside-Down Sloth, The | Robinson, Fay | 3.0 | 0.5 |
| 41840 | Upside-Down, Inside-Out, Backwards, Oopsy-Daisy Book, The | Hollingsworth, Mary | 2.6 | 0.5 |
| 54348 | Upstairs | Enderle, Judith Ross | 2.6 | 0.5 |
| 68883 | Upstairs Cat, The | Kuskin, Karla | 2.9 | 0.5 |
| 88683 | Upstairs Mouse, Downstairs Mole | Yee, Wong Herbert | 3.0 | 0.5 |
| 88683 | Upstairs Mouse, Downstairs Mole | Yee, Wong Herbert | 3.0 | 0.5 |
| 143 | Upstairs Room, The | Reiss, Johanna | 5.4 | 7.0 |
| 143 | Upstairs Room, The | Reiss, Johanna | 5.4 | 7.0 |
| 143 | Upstairs Room, The | Reiss, Johanna | 5.4 | 7.0 |
| 102565 | Upstate | Buckhanon, Kalisha | 5.2 | 10.0 |
| 87841 | Upstream | Lion, Melissa | 4.3 | 6.0 |
| 44437 | Uptown | Collier, Bryan | 2.8 | 0.5 |
| 51934 | Uptown Poodle, Downtown Pups | Saunders, Susan | 4.3 | 1.0 |
| 70534 | Ural Mountains, The | Maynard, Charles W. | 5.9 | 0.5 |
| 70353 | Urano | Adamson, Thomas K. | 3.7 | 0.5 |
| 61900 | Urano | Asimov, Isaac | 6.1 | 0.5 |
| 102755 | Urano | Taylor-Butler, Christine | 2.9 | 0.5 |
| 61900 | Uranus | Asimov, Isaac | 6.1 | 0.5 |
| 78729 | Uranus | Birch, Robin | 5.4 | 0.5 |
| 1627 | Uranus | Brimner, Larry Dane | 4.5 | 0.5 |
| 6194 | Uranus | Fradin, Dennis B. | 4.4 | 0.5 |
| 66765 | Uranus | George, Linda | 6.8 | 1.0 |
| 77025 | Uranus | Goldstein, Margaret J. | 3.3 | 0.5 |
| 116619 | Uranus | Howard, Fran | 4.0 | 0.5 |
| 118770 | Uranus | Landau, Elaine | 4.7 | 0.5 |
| 61349 | Uranus | Potts, Steve | 6.0 | 0.5 |
| 62122 | Uranus | Rau, Dana Meachen | 3.9 | 0.5 |
| 84052 | Uranus | Ring, Susan | 4.3 | 0.5 |
| 63971 | Uranus | Stefoff, Rebecca | 8.2 | 2.0 |
| 66522 | Uranus | Stewart, Melissa | 6.9 | 1.0 |
| 71905 | Uranus | Stille, Darlene R. | 4.9 | 0.5 |
| 102755 | Uranus | Taylor-Butler, Christine | 2.0 | 0.5 |
| 45625 | Uranus | Thompson, Luke | 4.6 | 0.5 |
| 116228 | Uranus | Wimmer, Teresa | 2.6 | 0.5 |
| 80520 | Uranus (5-7) | Shaw, Andrea | 5.3 | 0.5 |
| 4876 | Uranus (Capstone Press) | Vogt, Gregory | 4.2 | 0.5 |
| 131432 | Uranus (Early Bird Astronomy) | Vogt, Gregory L. | 4.3 | 0.5 |
| 70353 | Uranus (Exploring the Galaxy) | Adamson, Thomas K. | 1.7 | 0.5 |
| 19947 | Uranus (Gateway Solar System) | Vogt, Gregory | 6.0 | 0.5 |
| 80031 | Uranus (K-1) | Shaw, Andrea | 1.6 | 0.5 |
| 84590 | Uranus (Solar System) | Adamson, Thomas K. | 3.3 | 0.5 |
| 55186 | Uranus, Neptune, & Pluto | Sparrow, Giles | 7.4 | 1.0 |
| 68009 | Uranus, Neptune, and Pluto | Goss, Tim | 5.4 | 1.0 |
| 47395 | Uranus, Neptune, and Pluto | Kerrod, Robin | 6.9 | 1.0 |
| 125680 | Uranus, Neptune, and the Dwarf Planets | Mist, Rosalind | 4.5 | 0.5 |
| 62286 | Uranus: The Seventh Planet | Cole, Michael D. | 7.7 | 1.0 |
| 128863 | Urban Goddess | Hayes, Sonia | 4.8 | 6.0 |
| 102287 | Urban Legends | Kallen, Stuart A. | 9.8 | 4.0 |
| 5912 | Urban Roosts: Where Birds Nest in the City | Bash, Barbara | 5.6 | 0.5 |
| 5912 | Urban Roosts: Where Birds Nest in the City | Bash, Barbara | 5.6 | 0.5 |
| 66904 | Urban Survival Techniques | Wilson, Patrick | 8.0 | 1.0 |
| 108614 | Urban Wildlife Habitats | Taylor, Barbara | 7.4 | 2.0 |
| 12844 | Urbanities: Visions of the Metropolis | Rosen, Roger | 8.5 | 8.0 |
| 109050 | Urchin and the Heartstone | McAllister, M.I. | 5.8 | 11.0 |
| 109050 | Urchin and the Heartstone | McAllister, M.I. | 5.8 | 11.0 |
| 126935 | Urchin and the Raven War | McAllister, M.I. | 5.5 | 10.0 |
| 102205 | Urchin de las estrellas fugaces | McAllister, M.I. | 5.5 | 10.0 |
| 102205 | Urchin of the Riding Stars | McAllister, M.I. | 5.4 | 10.0 |
| 102205 | Urchin of the Riding Stars | McAllister, M.I. | 5.4 | 10.0 |
| 109050 | Urchin y la Piedra de Corazón | McAllister, M I. | 5.6 | 12.0 |
| 114282 | Uri's U Book | Mazzeo, J.L. | 2.7 | 0.5 |
| 63169 | Uriah's Unicorn: The Letter U (long u) | Alexander, Linda | 1.5 | 0.5 |
| 126238 | Urso Brunov and the White Emperor | Jacques, Brian | 4.1 | 0.5 |
| 104365 | Ursula y Urbano | Camarena, Cathy | 1.0 | 0.5 |
| 63196 | Ursula's Sunny Day: The Letter U (u) | Alexander, Linda | 1.1 | 0.5 |
| 29808 | Uruguay | Jermyn, Leslie | 8.9 | 3.0 |
| 105592 | Uruguay | Morrison, Marion | 8.8 | 4.0 |
| 68673 | Uruguay | Shields, Charles J. | 8.2 | 1.0 |
| 132431 | Uruguay in Pictures (Second Series) | Behnke, Alison | 7.6 | 2.0 |
| 26185 | Uruguay...in Pictures | Geography-Department | 9.9 | 2.0 |
| 1463 | USA | Berg, Elizabeth | 8.5 | 2.0 |
| 1490 | USA | Berg, Elizabeth | 6.0 | 0.5 |
| 39638 | USA | Phillipson, Olly | 9.2 | 3.0 |
| 101728 | USA Patriot Act: Antiterror Legislation in Response to 9/11, The | Scheppler, Bill | 10.9 | 2.0 |
| 117562 | USA, The | Senker, Cath | 4.8 | 0.5 |
| 124395 | USAF Special Tactics Teams | Porterfield, Jason | 9.4 | 2.0 |
| 117202 | Usamos matemáticas en la fiesta del salón | Rauen, Amy | 2.7 | 0.5 |
| 100838 | Usando colores | Thomas, Isabel | 2.2 | 0.5 |
| 113688 | Usar el agua | Cooper, Sharon Katz | 2.9 | 0.5 |
| 113683 | Usar el aire | Cooper, Sharon Katz | 3.2 | 0.5 |
| 113684 | Usar el carbón, el petróleo y el gas | Cooper, Sharon Katz | 3.9 | 0.5 |
| 60935 | Usar la electricidad | Royston, Angela | 4.5 | 0.5 |
| 113687 | Usar la tierra | Cooper, Sharon Katz | 3.1 | 0.5 |
| 113685 | Usar las plantas | Cooper, Sharon Katz | 3.3 | 0.5 |
| 113686 | Usar las rocas | Cooper, Sharon Katz | 3.1 | 0.5 |
| 29026 | USC Trojans | Braun, Eric | 6.9 | 1.0 |
| 80581 | Use Your Senses | Stewart, Melissa | 4.0 | 0.5 |
| 31131 | Used-Up Bear | Carmichael, Clay | 3.6 | 0.5 |
| 115912 | Useful Fools | Schmidt, C.A. | 4.0 | 9.0 |
| 108074 | Useful Girl: A Novel | Stevens, Marcus | 5.6 | 14.0 |
| 81224 | Useful Idiots | Mark, Jan | 6.7 | 17.0 |
| 105964 | Useful Moose: A Truthful, Moose-Full Tale, The | Robinson, Fiona | 2.5 | 0.5 |
| 112765 | Useful Nose, A | Holden, Pam | 3.8 | 0.5 |
| 118724 | Useful Tails | O'Hare, Ted | 2.4 | 0.5 |
| 21758 | Useless Dog | Clark, Billy C. | 4.9 | 4.0 |
| 53443 | User Unfriendly | Vande Velde, Vivian | 5.0 | 10.0 |
| 128346 | Uses Her Common Cents | Mullarkey, Lisa | 3.6 | 1.0 |
| 110197 | Usher | Adams, Colleen | 6.0 | 0.5 |
| 89806 | Usher | Horn, Geoffrey M. | 4.8 | 1.0 |
| 111758 | Usher | Lord, Raymond | 7.5 | 2.0 |
| 111817 | Usher | Masar, Brenden | 8.9 | 4.0 |
| 109844 | Usher | Rodney, Dave | 8.4 | 1.0 |
| 54079 | Usher | Talmadge, Morgan | 6.2 | 1.0 |
| 127410 | Usher | Tieck, Sarah | 3.9 | 0.5 |
| 119404 | Usher | Torres, John | 6.1 | 1.0 |
| 103668 | Usher (Freestyle) | Whitcombe, Dan | 5.8 | 1.0 |
| 100112 | Usher: The Godson of Soul | Nickson, Chris | 7.8 | 4.0 |
| 50577 | Using a Beak | Windsor, Jo | 3.3 | 0.5 |
| 119360 | Using a Computer | Greenhills, Chantelle | 4.3 | 0.5 |
| 50578 | Using a Tail | Windsor, Jo | 2.7 | 0.5 |
| 103395 | Using a Wheelchair | Royston, Angela | 4.1 | 0.5 |
| 113683 | Using Air | Cooper, Sharon Katz | 2.4 | 0.5 |
| 113684 | Using Coal, Oil, and Gas | Cooper, Sharon Katz | 2.7 | 0.5 |
| 100838 | Using Color | Thomas, Isabel | 2.2 | 0.5 |
| 4282 | Using Color in Art | Richardson, Joy | 3.5 | 0.5 |
| 72573 | Using Computers: Machine with a Mouse | Burstein, John | 2.4 | 0.5 |
| 117846 | Using Credit Wisely | Minden, Cecilia | 5.6 | 0.5 |
| 131788 | Using Earth's Underground Heat | White, Nancy | 5.9 | 0.5 |
| 60935 | Using Electricity | Royston, Angela | 4.1 | 0.5 |
| 101513 | Using Electricity: Switch It On | Pipe, Jim | 3.2 | 0.5 |
| 126547 | Using Energy | Hewitt, Sally | 6.3 | 1.0 |
| 63769 | Using Energy | Jerome, Kate Boehm | 6.1 | 0.5 |
| 77728 | Using Energy Wisely | McClellan, Dina | 3.3 | 0.5 |
| 35889 | Using Fire | Sloan, Peter | 1.9 | 0.5 |
| 63759 | Using Force and Motion | Phelan, Glen | 4.9 | 1.0 |
| 111467 | Using Graphs | Ellis, Julie | 2.9 | 0.5 |
| 100137 | Using Instructions | Rooney, Anne | 4.3 | 0.5 |
| 82737 | Using Leaves | Windsor, Jo | 1.3 | 0.5 |
| 88607 | Using Levers | Sadler, Wendy | 4.5 | 0.5 |
| 76833 | Using Machines | Hewitt, Sally | 4.4 | 0.5 |
| 35882 | Using Machines | Sloan, Peter | 1.2 | 0.5 |
| 117202 | Using Math at the Class Party | Rauen, Amy | 2.1 | 0.5 |
| 120643 | Using Math Outdoors | Rauen, Amy | 1.0 | 0.5 |
| 120640 | Using Math to Make Party Plans | Freese, Joan | 2.3 | 0.5 |
| 120642 | Using Money on a Shopping Trip | Marrewa, Jennifer | 2.6 | 0.5 |
| 113685 | Using Plants | Cooper, Sharon Katz | 2.1 | 0.5 |
| 88608 | Using Pulleys and Gears | Sadler, Wendy | 4.9 | 0.5 |
| 88609 | Using Ramps and Wedges | Sadler, Wendy | 4.7 | 0.5 |
| 113686 | Using Rocks | Cooper, Sharon Katz | 2.5 | 0.5 |
| 66905 | Using Ropes and Knots | Wilson, Patrick | 7.2 | 1.0 |
| 132426 | Using Scientific Tools | Meredith, Susan Markowitz | 5.4 | 0.5 |
| 88610 | Using Screws | Sadler, Wendy | 4.9 | 0.5 |
| 4285 | Using Shadows in Art | Richardson, Joy | 3.3 | 0.5 |
| 113687 | Using Soil | Cooper, Sharon Katz | 2.7 | 0.5 |
| 88611 | Using Springs | Sadler, Wendy | 4.7 | 0.5 |
| 65473 | Using the Internet Safely | Loughran, Donna | 5.1 | 1.0 |
| 35254 | Using the Library | Wilson, Sarah | 2.8 | 0.5 |
| 50472 | Using the River | Llewellyn, Claire | 3.6 | 0.5 |
| 113688 | Using Water | Cooper, Sharon Katz | 2.3 | 0.5 |
| 126548 | Using Water | Hewitt, Sally | 5.7 | 1.0 |
| 35860 | Using Wheels | Sloan, Peter | 1.0 | 0.5 |
| 88612 | Using Wheels and Axles | Sadler, Wendy | 4.7 | 0.5 |
| 78182 | Using Your Senses | Delta Education Editors | 3.1 | 0.5 |
| 124396 | USMC Reconnaissance Battalions | Orr, Tamra B. | 8.3 | 1.0 |
| 124397 | USMC Special Reaction Teams | Orr, Tamra B. | 8.7 | 1.0 |
| 131792 | USS Arizona Memorial | Robins, Maureen Picard | 6.7 | 0.5 |
| 25165 | USS Arizona, The | Stein, R. Conrad | 6.3 | 1.0 |
| 78856 | USS Constellation: Pride of the American Navy | Myers, Walter Dean | 8.3 | 2.0 |
| 62588 | USS Greeneville Submarine Disaster, The | Fein, Eric | 8.6 | 1.0 |
| 67033 | Usual Rules, The | Maynard, Joyce | 5.1 | 20.0 |
| 78783 | Usurper's Crown: A Novel of Isavalta, The | Zettel, Sarah | 6.1 | 31.0 |
| 13852 | UT Austin: Traditions and Nostalgia | Berry, Margaret Catherine | 9.1 | 6.0 |
| 108793 | Utah | Brown, Jonatha A. | 4.7 | 1.0 |
| 71445 | Utah | Deady, Kathleen W. | 5.7 | 1.0 |
| 69731 | Utah | Feinstein, Stephen | 7.2 | 1.0 |
| 12445 | Utah | Fradin, Dennis B. | 4.5 | 1.0 |
| 133542 | Utah | Gish, Melissa | 6.0 | 0.5 |
| 71493 | Utah | Heinrichs, Ann | 5.4 | 1.0 |
| 20195 | Utah | Joseph, Paul | 4.9 | 0.5 |
| 63307 | Utah | Kaserman, James F. | 5.4 | 0.5 |
| 47059 | Utah | Kent, Deborah | 8.1 | 4.0 |
| 30770 | Utah | Kummer, Patricia K. | 4.8 | 1.0 |
| 7845 | Utah | McCarthy, Betty | 8.4 | 3.0 |
| 100739 | Utah | Murray, Julie | 4.0 | 0.5 |
| 63389 | Utah | Neri, P. J. | 6.8 | 2.0 |
| 106961 | Utah | Obregón, José María | 3.4 | 0.5 |
| 132701 | Utah | Ollhoff, Jim | 5.2 | 0.5 |
| 53341 | Utah | Parker, Janice | 7.4 | 1.0 |
| 26231 | Utah | Sirvaitis, Karen | 6.4 | 1.0 |
| 47212 | Utah | Stefoff, Rebecca | 8.3 | 2.0 |
| 24790 | Utah | Thompson, Kathleen | 7.5 | 1.0 |
| 115262 | Utah | Trueit, Trudi Strain | 3.0 | 0.5 |
| 12445 | Utah | Fradin, Dennis B. | 4.5 | 1.0 |
| 101868 | Utah (Child's World) | Heinrichs, Ann | 3.8 | 0.5 |
| 106961 | Utah (Spanish) | Obregón, José María | 4.1 | 0.5 |
| 130362 | Utah (Third Series) | Kent, Deborah | 7.6 | 3.0 |
| 127364 | Utah Blaine | L'Amour, Louis | 4.6 | 8.0 |
| 40578 | Utah Facts and Symbols | Feeney, Kathy | 4.0 | 0.5 |
| 27839 | Utah Jazz | Joseph, Paul | 7.0 | 1.0 |
| 17947 | Utah Jazz | Rambeck, Richard | 6.2 | 1.0 |
| 116958 | Utah Jazz, The | Stewart, Mark | 5.7 | 1.0 |
| 85518 | Utah: The Beehive State | Encyclopaedia Britannica | 6.9 | 1.0 |
| 69386 | Utah: The Beehive State | Hirschmann, Kris | 8.4 | 2.0 |
| 15446 | Utahraptor: The Deadliest Dinosaur | Lessem, Don | 6.6 | 1.0 |
| 76866 | Ute | Gray-Kanatiiosh, Barbara A. | 4.8 | 0.5 |
| 69830 | Ute | Ryan, Marla Felkins | 5.1 | 0.5 |
| 13386 | Ute, The | Doherty, Katherine M. | 6.8 | 1.0 |
| 20519 | Utes, The | Flanagan, Alice K. | 5.8 | 0.5 |
| 56325 | Utes, The | Lassieur, Allison | 4.2 | 0.5 |
| 103776 | Uther | Whyte, Jack | 8.2 | 58.0 |
| 21966 | Uti-Tanka, pequeño bisonte | Camus, William | 4.7 | 7.0 |
| 74974 | Utopia | Child, Lincoln | 5.7 | 23.0 |
| 42524 | Utopian Visionaries | Streissguth, Thomas | 9.4 | 4.0 |
| 72388 | Utten and Plumley | Whinnem, Reade Scott | 4.9 | 10.0 |
| 68989 | Utterly Me, Clarice Bean | Child, Lauren | 5.5 | 3.0 |
| 68989 | Utterly Me, Clarice Bean | Child, Lauren | 5.5 | 3.0 |
| 123457 | Utterly Otterly Day | Casanova, Mary | 2.4 | 0.5 |
| 14600 | Utterly Yours, Booker Jones | Duffey, Betsy | 4.0 | 3.0 |
| 14600 | Utterly Yours, Booker Jones | Duffey, Betsy | 4.0 | 3.0 |
| 40508 | Uu | Doudna, Kelly | 0.7 | 0.5 |
| 36932 | Uu | Salzmann, Mary Elizabeth | 1.9 | 0.5 |
| 114852 | Uzbekistan | Knowlton, MaryLee | 9.5 | 5.0 |
| 11133 | Uzbekistan | Rodgers, Mary | 8.8 | 1.0 |
| 108899 | Uzbekistan in Pictures (Second Series) | Waters, Bella | 7.7 | 2.0 |
| 32235 | Uñaca la urraca | Mitchell, Linda | 1.0 | 0.5 |
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| Last updated on Feb 9, 2010
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