| Twenty Ads that Shook the World | Twitchell, James B. | "Reference/Miscellaneous"
| 215 | 2000 | 8 | 2000-12-06 |
| Twenty Days | Kunhardt, Dorothy | "U.S. History - Political"
| 303 | 1965 | 8 | 1987-04-18 |
| Twenty Thousand Leagues Under the Sea | Verne, Jules | "Fiction - Adventure"
| 288 | 1869 | 6 | 1996-03-21 |
| Twenty-Eight and a Half Wishes | Swank, Denise Grover | "Fiction - Mystery"
| 277 | 2011 | 4 | 2021-07-04 |
| Twig the Collie | Massey, Craig | "Fiction - Chapter Books"
| 128 | 1958 | 6 | 2019-01-04 |
| Twilight of Empire (6) | Eckert, Allan W. | "U.S. History - Cultural"
| 0 | 1997 | | |
| Two for the Dough | Evanovich, Janet | "Fiction - Mystery"
| 301 | 1996 | 6 | 2001-01-28 |
| Two Gentlemen of Verona | Shakespeare, William | "Drama"
| 94 | 1592 | 6 | 1997-01-16 |
| Two in the Field | Brock, Darryl | "Fiction - Historical"
| 382 | 2002 | 6 | 2008-10-04 |
| Two Little Savages | Seton, Ernest Thompson | "Fiction - Chapter Books"
| 286 | 1903 | 8 | 2005-06-06 |
| Two O'Clock, Eastern Wartime | Dunning, John | "Fiction - General"
| 478 | 2001 | 6 | 2008-01-15 |
| Two on a Tower | Hardy, Thomas | "Fiction - Romance"
| 314 | 1882 | 7 | 1996-11-30 |
| Two Princesses of Bamarre, The | Levine, Gail Carson | "Fiction - S. F./Fantasy"
| 241 | 2000 | 8 | 2001-10-29 |
| Two Towers, The | Tolkien, J.R.R. | "Fiction - S. F./Fantasy"
| 447 | 1965 | 6 | |
| Two Years Before the Mast | Dana, Richard Henry, Jr. | "Travel"
| 405 | 1840 | 8 | 1995-06-18 |
| 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 | |
| Ukridge | Wodehouse, P.G. | "Fiction - Short Story Collection"
| 0 | 1924 | | |
| 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 Dynamite | Wodehouse, P.G. | "Fiction - Humorous Novels"
| 0 | 1948 | | |
| Uncle Fred in the Springtime | Wodehouse, P.G. | "Fiction - Humorous Novels"
| 0 | 1939 | | |
| 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 |
| Uncollected Wodehouse, The | Wodehouse, P.G. | "Fiction - Short Story Collection"
| 0 | 1976 | | |
| 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 Tuscan Sun | Mayes, Frances | "Travel"
| 304 | 1997 | 7 | 2007-08-24 |
| Understood Betsy | Canfield, Dorothy | "Fiction - Chapter Books"
| 188 | 1983 | 6 | 2003-08-31 |
| Uneasy Money | Wodehouse, P.G. | "Fiction - Humorous Novels"
| 0 | 1917 | | |
| Unexpected Mrs. Pollifax, The | Gilman, Dorothy | "Fiction - Adventure"
| 382 | 1970 | 6 | 1997-09-03 |
| Unforgiven, The | 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 |