| Ty Cobb | Alexander, Charles C. | "Sports"
| 240 | 1984 | 7 | 2002-02-27 |
| Typee | Melville, Herman | "Fiction - General"
| 305 | 1846 | 8 | 1997-06-08 |
| Types in Hebrews | Anderson, Sir Robert | "Theology"
| 156 | | 7 | 0000-00-00 |
| U.S. 40 | Stewart, George R. | "Travel"
| 309 | 1953 | 7 | 2019-03-21 |
| U.S.S. Cairo | Jones, Harold L. Peterson and Virgil Carrington | "U.S. History - Military"
| 55 | 1971 | 7 | |
| Ultimate Baseball Book, The | Okrent and Harris Lewine, Daniel | "Sports"
| 346 | 1979 | 8 | 2001-08-14 |
| Ulysses S. Grant: The Galena Years | Repp, Steve | "Autobiographies, Memoirs and Biographies"
| 64 | 1985 | 6 | 2006-06-21 |
| Umpire Strikes Back, The | Luciano, Ron | "Sports"
| 258 | 1982 | 8 | 1987-05-31 |
| Unbroken | Hillenbrand, Laura | "U.S. History - Military"
| 406 | 2010 | 6 | 2013-05-15 |
| Uncle John's Fully Loaded 25th Anniversary Bathroom Reader | Bathroom Readers' Institute, The | "Literature/Essays"
| 604 | 2012 | 6 | 2022-12-12 |
| Uncle John's Legendary Lost Bathroom Readers | Bathroom Readers' Institute, The | "Literature/Essays"
| 673 | 1999 | 6 | 2002-06-24 |
| Uncle Remus: His Songs and Sayings | Harris, Joel Chandler | "Literature/Essays"
| 270 | 1880 | 8 | 1995-12-30 |
| Uncle Tom's Cabin | Stowe, Harriet Beecher | "Fiction - Historical"
| 494 | 1852 | 7 | 1993-09-15 |
| Uncommercial Traveller, The | Dickens, Charles | "Literature/Essays"
| 362 | 1860 | 5 | 2002-03-10 |
| Uncommon Carriers | McPhee, John | "Travel"
| 248 | 2006 | 7 | 2006-06-10 |
| Uncommon Type | Hanks, Tom | "Fiction - Short Story Collection"
| 403 | 2017 | 5 | 2018-12-25 |
| Undaunted Courage | Ambrose, Stephen E. | "U.S. History - Cultural"
| 484 | 1996 | 7 | 2001-06-09 |
| Under the Banner of Heaven | Krakauer, Jon | "U.S. History - Cultural"
| 372 | 2003 | 6 | 2005-03-24 |
| Under the Greenwood Tree | Hardy, Thomas | "Fiction - General"
| 198 | 1872 | 7 | 1989-07-09 |
| Under the Rainbow | Scarlett, Susan | "Fiction - General"
| 0 | | | |
| Under the Tuscan Sun | Mayes, Frances | "Travel"
| 304 | 1997 | 7 | 2007-08-24 |
| Understood Betsy | Canfield, Dorothy | "Fiction - Chapter Books"
| 188 | 1983 | 6 | 2003-08-31 |
| Unexpected Mrs. Pollifax, The | Gilman, Dorothy | "Fiction - Adventure"
| 382 | 1970 | 6 | 1997-09-03 |
| Unforgiven, The (Libby) | LeMay, Alan | "Fiction - Western"
| 0 | | | |
| Universe Next Door, The | Sire, James W. | "Theology"
| 250 | 2004 | 9 | 2004-11-27 |
| Unknown Shore, The | O'Brian, Patrick | "Fiction - Historical"
| 316 | 1959 | 7 | 2000-05-06 |
| Unlikely Pilgrimage of Harold Fry, The | Joyce, Rachel | "Fiction - General"
| 320 | 2012 | 6 | 2019-05-18 |
| Unlocking the Bible Story: Volume 1 | Smith, Colin S. | "Theology"
| 297 | 2002 | 8 | 2002-04-03 |
| Unlocking the Bible Story: Volume 3 | Smith, Colin S. | "Theology"
| 266 | 2002 | 7 | 2003-02-27 |
| Unpacking "Chuck" | Bush, G. Walter | "Arts and Entertainment"
| 161 | 2014 | 5 | 2023-02-07 |
| Unpleasantness at the Bellona Club, The | Sayers, Dorothy L. | "Fiction - Mystery"
| 192 | 1928 | 7 | 1997-03-02 |
| Unrest-Cure and Other Stories, The | Saki, | "Fiction - Short Story Collection"
| 164 | 1964 | 7 | 2025-10-05 |
| Unruly | Mitchell, David | "World History - Political"
| 403 | 2023 | 6 | 2025-11-27 |
| Unruly Places | Bonnett, Alastair | "Travel"
| 253 | 2014 | 5 | 2024-03-16 |
| Unselected Journals of Emma M. Lion Vol. 1, The | Brower, Beth | "Fiction - General"
| 106 | 2019 | 7 | 2026-06-23 |
| Unselected Journals of Emma M. Lion Vol. 2, The | Brower, Beth | "Fiction - General"
| 148 | 2019 | 8 | 2026-06-26 |
| Unselected Journals of Emma M. Lion Vol. 3, The | Brower, Beth | "Fiction - General"
| 229 | 2020 | 7 | 2026-06-30 |
| Unselected Journals of Emma M. Lion Vol. 4, The | Brower, Beth | "Fiction - General"
| 209 | 2021 | 10 | 2026-07-01 |
| Unselected Journals of Emma M. Lion Vol. 5, The | Brower, Beth | "Fiction - General"
| 249 | 2021 | 7 | 2026-07-04 |
| Unselected Journals of Emma M. Lion Vol. 6, The | Brower, Beth | "Fiction - General"
| 233 | 2022 | 8 | 2026-07-05 |
| Unselected Journals of Emma M. Lion Vol.7, The | Brower, Beth | "Fiction - General"
| 301 | 2023 | 8 | 2026-07-06 |
| Unselected Journals of Emma M. Lion Vol.8, The | Brower, Beth | "Fiction - General"
| 341 | 2024 | 8 | 2026-07-07 |
| Untamed | Hall, Warner | "Fiction - Adventure"
| 192 | | 5 | 1987-05-11 |
| Unwise Passions | Crawford, Alan Pell | "U.S. History - Cultural"
| 296 | 2000 | 8 | 2002-12-05 |
| Up Country | DeMille, Nelson | "Fiction - Adventure"
| 706 | 2002 | 8 | 2003-05-16 |
| Up From Slavery | Washington, Booker T. | "U.S. History - Cultural"
| 241 | 1900 | 5 | 1999-05-12 |
| Up Front | Mauldin, Bill | "U.S. History - Military"
| 217 | 1945 | 8 | 1990-11-05 |
| Up In the Old Hotel | Mitchell, Joseph | "Literature/Essays"
| 718 | 1992 | 7 | 2004-03-05 |
| Up the Down Stair Case | Kaufman, Bel | "Fiction - General"
| 350 | 1964 | 7 | 1987-12-31 |
| Up, Up, and Away | Keri, Jonah | "Sports"
| 383 | 2014 | 6 | 2025-03-05 |
