| Innocents Abroad, The | Twain, Mark | "Travel"
| 429 | 1869 | 8 | 1998-01-09 |
| Insane City | Barry, Dave | "Fiction - Humorous Novels"
| 341 | 2013 | 7 | 2015-09-22 |
| Inside Lincoln's White House | Hay, John | "U.S. History - Political"
| 254 | 1997 | 6 | 1999-08-29 |
| Inside Mayberry | Habeeb, Dan Harrison and Bill | "Arts and Entertainment"
| 282 | 1994 | 5 | 2020-03-09 |
| Inside the Atom | Asimov, Isaac | "Nature/Science"
| 216 | 1956 | 7 | 1987-11-30 |
| Inside the Tower | Bartholomew, James | "World History - Political"
| 127 | 1990 | 7 | 1995-04-02 |
| Instant It Happened, The | Associated Press, The | "World History - Cultural"
| 239 | 1975 | 8 | 2001-03-11 |
| Instant Pogo | Kelly, Walt | "Humor"
| 127 | 1959 | 7 | |
| Interesting Times | Pratchett, Terry | "Fiction - S. F./Fantasy"
| 295 | 1994 | 6 | 2010-04-16 |
| Intergalactic Interloper, The | Heras, Delas | "Fiction - S. F./Fantasy"
| 216 | 2020 | 5 | 2024-12-16 |
| Interior Desecrations | Lileks, James | "Art/Photography"
| 175 | 2004 | 6 | 2006-05-30 |
| Into the Blizzard | Winter, Michael | "World History - Military"
| 326 | 2014 | 4 | 2018-11-21 |
| Into the Heart of Borneo | O'Hanlon, Redmond | "Travel"
| 183 | 1984 | 7 | 1999-12-22 |
| Into the Porcupine Cave and Other Odysseys | Warner, William | "Nature/Science"
| 247 | 1999 | 5 | 2026-01-28 |
| Into the Twilight, Endlessly Grousing | McManus, Patrick F. | "Humor"
| 213 | 1997 | 6 | 2015-09-15 |
| Into the Wild | Krakauer, Jon | "Travel"
| 203 | 1996 | 7 | 2010-08-01 |
| Into Thin Air | Iams, Jack | "Fiction - Mystery"
| 246 | 1952 | 8 | 2026-05-04 |
| Into Thin Air | Krakauer, Jon | "Travel"
| 368 | 1999 | 7 | 2005-05-01 |
| Intruder in the Dust | Faulkner, William | "Fiction - General"
| 185 | 1948 | 6 | 2009-11-24 |
| Intrusion of Jimmy, The | Wodehouse, P.G. | "Fiction - Humorous Novels"
| 314 | 1910 | 7 | |
| Invasion of Canada: 1812-1813, The | Berton, Pierre | "U.S. History - Military"
| 441 | 1980 | 9 | 2000-07-21 |
| Inventing Wyatt Earp: His Life and Many Legends | Barra, Allen | "U.S. History - Cultural"
| 408 | 1998 | 7 | 2001-06-24 |
| Invention of Hugo Cabret | Selznick, Brian | "Fiction - Chapter Books"
| 530 | 2007 | 6 | 2012-02-27 |
| Invisible Man | Ellison, Ralph | "Fiction - General"
| 58 | 1947 | 2 | 2006-03-20 |
| Invisible Man, The | Wells, H.G. | "Fiction - Mystery"
| 220 | 1897 | 7 | 2007-08-06 |
| Ion | Euripides, | "Drama"
| 79 | 410BC | 4 | 1997-03-08 |
| Ionian Mission, The | O'Brian, Patrick | "Fiction - Historical"
| 367 | 1981 | 10 | 1998-11-19 |
| Iowa Baseball Confederacy, The | Kinsella, W.P. | "Fiction - General"
| 310 | 1986 | 6 | 1999-10-15 |
| Irish R. M., The | Ross, E. E. Somerville and Martin | "Fiction - General"
| 591 | 1915 | 9 | 2000-02-09 |
| Irons in the Fire | McPhee, John | "Literature/Essays"
| 216 | 1997 | 8 | 2001-07-20 |
| Ironwood Tree, The | DiTerlizzi, Holly Black and Tony D. | "Fiction - Chapter Books"
| 108 | 2004 | 7 | 2004-09-16 |
| Is That a Fish in Your Ear? | Bellos, David | "Reference/Miscellaneous"
| 338 | 2011 | 7 | 2019-01-18 |
| Is There Only One Chicago | Heise, Kenan | "Travel"
| 236 | | 7 | 1994-08-26 |
| Is This Anything? | Seinfeld, Jerry | "Humor"
| 452 | 2020 | 7 | 2023-03-13 |
| Isaac's Storm | Larson, Erik | "Nature/Science"
| 277 | 1999 | 7 | 2000-02-04 |
| Island of Doctor Moreau, The | Wells, H.G. | "Fiction - S. F./Fantasy"
| 219 | 1896 | 5 | 2001-02-15 |
| Island of the Blue Dolphins | O'Dell, Scott | "Fiction - Chapter Books"
| 184 | 1961 | 7 | 2001-04-22 |
| Islandia | Wright, Austin Tappan | "Fiction - S. F./Fantasy"
| 944 | 1942 | 7 | 1995-09-03 |
| It Looked Like For Ever | Harris, Mark | "Fiction - General"
| 276 | 1979 | 4 | 2025-11-07 |
| It Takes A Village Idiot | Mullen, Jim | "Autobiographies, Memoirs and Biographies"
| 215 | 2001 | 6 | 2024-12-30 |
| It Was a Dark and Stormy Night | Rice (ed.), Scott | "Literature/Essays"
| 144 | 1984 | 5 | 2000-07-03 |
| It's a Magical World | Watterson, Bill | "Humor"
| 165 | 1996 | 9 | 2001-01-05 |
| It's All a Game | Donovan, Tristan | "Reference/Miscellaneous"
| 256 | 2017 | 7 | 2018-07-04 |
| It's All Relative | Jacobs, A.J. | "Reference/Miscellaneous"
| 279 | 2017 | 5 | 2021-04-02 |
| It's Loaded Mr. Bauer | Marquand, John P. | "Fiction - Adventure"
| 188 | 1949 | 7 | 2021-09-08 |
| Ivanhoe | Scott, Sir Walter | "Fiction - Historical"
| 497 | 1819 | 7 | 1988-07-26 |
| J.B. | MacLeish, Archibald | "Drama"
| 160 | 1989 | 5 | 2006-09-22 |
| Jacaranda Tree, The | Bates, H.E. | "Fiction - Historical"
| 288 | 1949 | 6 | 2026-05-17 |
| Jack Absolute | Humphreys, C.C. | "Fiction - Adventure"
| 310 | 2004 | 8 | 2015-09-06 |
| Jackal's Mistress, The | Bohjalian, Chris | "Fiction - Historical"
| 318 | 2025 | 6 | 2025-12-09 |
