| Otley (ebay) | Waddell, Martin | "Fiction - Adventure"
| 0 | | | |
| Our American Cousin | Taylor, Tom | "Drama"
| 102 | 1851 | 9 | 1909-09-15 |
| Our Man in Havana | Greene, Graham | "Fiction - Adventure"
| 242 | 1958 | 7 | 1997-09-13 |
| Our Marvelous Native Tongue | Claiborne, Robert | "Literature/Essays"
| 307 | | 7 | 1994-09-11 |
| Our Murdered Presidents: The Medical Story | Brooks, Stewart M. | "U.S. History - Political"
| 202 | 1966 | 5 | 2000-07-30 |
| Our Mutual Friend | Dickens, Charles | "Fiction - General"
| 911 | 1865 | 10 | 1995-03-10 |
| Our Oriental Heritage | Durant, Will | "World History - Cultural"
| 385 | 1935 | 5 | 1997-08-21 |
| Our Smallest Towns | Kitchen, Dennis | "Travel"
| 111 | 1995 | 7 | 2000-01-04 |
| Our Town | Wilder, Thornton | "Drama"
| 143 | 1938 | 4 | 1992-09-13 |
| Our Vanishing Landscape | Sloane, Eric | "U.S. History - Cultural"
| 107 | 1955 | 9 | 1990-02-03 |
| Out of Africa | Dinesen, Isak | "Travel"
| 389 | 1937 | 8 | 1997-02-08 |
| Out of the Blackout | Barnard, Robert | "Fiction - Mystery"
| 182 | 1984 | 6 | 2007-11-09 |
| Out of the Silent Planet | Lewis, C.S. | "Fiction - S. F./Fantasy"
| 160 | 1938 | 7 | 1995-04-25 |
| Outbreak | Stier, Greg | "Theology"
| 260 | 2006 | 7 | 2007-01-27 |
| Outermost House, The | Beston, Henry | "Nature/Science"
| 218 | 1928 | 6 | 2021-11-25 |
| Outlander | Gabaldon, Diana | "Fiction - Historical"
| 850 | 1992 | 6 | 2023-05-14 |
| Outlaw | Haycox, Ernest | "Fiction - Short Story Collection"
| 0 | 1939 | | |
| Outlaw on Horseback | Ermine, Will | "Fiction - Western"
| 238 | 1946 | 5 | 2022-12-14 |
| Outlined, Galatians, The | Lee, Robert | "Theology"
| 115 | | 5 | 2010-09-17 |
| Outside Lies Magic | Stilgoe, John R. | "Reference/Miscellaneous"
| 187 | 1998 | 6 | 1999-07-09 |
| Over Seventy (watch) | Wodehouse, P.G. | "Literature/Essays"
| 0 | 1957 | | |
| Over the Earth I Come | Schultz, Duane | "U.S. History - Military"
| 284 | 1992 | 8 | 2001-09-09 |
| Over Washington | Morgan, Murray | "Art/Photography"
| 254 | 1989 | 6 | 2000-03-04 |
| Overcoat and Other Stories, The | Gogol, Nikolai | "Fiction - Short Story Collection"
| 0 | 1841 | 6 | |
| Owl At Home | Lobel, Arnold | "Fiction - Chapter Books"
| 64 | 1975 | 7 | 2007-03-14 |
| Owls of the Eastern Ice | Slaght, Jonathan C. | "Nature/Science"
| 314 | 2020 | 6 | 2023-03-27 |
| Ox-Bow Incident, The | Clark, Walter Van Tilburg | "Fiction - Western"
| 224 | 1940 | 7 | |
| Ox-Team Days on the Oregon Trail | Meeker, Ezra | "U.S. History - Cultural"
| 142 | 1922 | 7 | 2022-10-02 |
| Oxford Book of Comic Verse, The | Gross (ed.), John | "Poetry Collections"
| 480 | 1994 | 6 | 1996-01-07 |
| Oz Scrapbook, The | Greene, Dick Martin and David L. | "Arts and Entertainment"
| 182 | 1977 | 6 | 1994-12-04 |
| Ozma of Oz | Baum, L. Frank | "Fiction - S. F./Fantasy"
| 258 | 1907 | 7 | 1994-11-07 |
| P.G.T. Beauregard | Williams, Harry T. | "U.S. History - Military"
| 329 | | 6 | 1987-04-04 |
| Pacific Crucible (1) | Toll, Ian W. | "U.S. History - Military"
| 491 | 2012 | 8 | 2019-05-09 |
| Pacific Vortex | Cussler, Clive | "Fiction - Adventure"
| 270 | 1983 | 6 | 1989-03-03 |
| Paddle-to-the-Sea | Holling, Holling Clancy | "Fiction - Chapter Books"
| 54 | 1941 | 9 | 1999-03-05 |
| Pale Gray for Guilt | MacDonald, John D. | "Fiction - Mystery"
| 224 | 1968 | 8 | 1993-03-16 |
| Pale Horseman, The | Cornwell, Bernard | "Fiction - Historical"
| 349 | 2006 | 7 | 2006-08-25 |
| Pamela | Richardson, Samuel | "Fiction - Romance"
| 533 | 1740 | 6 | 1996-02-01 |
| Pandora's Last Voyage | Rawson, Geoffrey | "Crime and Disaster (non-fiction)"
| 155 | 1963 | 6 | 1999-01-24 |
| Paper Lion | Plimpton, George | "Sports"
| 303 | 1966 | 7 | |
| Paper Towns | Green, John | "Fiction - Adventure"
| 305 | 2008 | 7 | 2015-12-16 |
| Papillon | Charriere, Henri | "World History - Cultural"
| 458 | 1970 | 7 | 2003-10-05 |
| Paradise Lost | Milton, John | "Poetry Collections"
| 500 | 1667 | 3 | 1996-02-17 |
| Paradiso | Alighieri, Dante | "Fiction - General"
| 368 | 1374 | 3 | 1992-10-16 |
| Parnassus on Wheels | Morley, Christopher | "Fiction - General"
| 160 | 1917 | 7 | 1993-12-12 |
| Parsifal Mosaic, The | Ludlum, Robert | "Fiction - Adventure"
| 630 | 1982 | 7 | |
| Part of the Furniture | Wesley, Mary | "Fiction - Chapter Books"
| 256 | 1997 | 6 | 1999-09-19 |
| Partisans | MacLean, Alistair | "Fiction - Adventure"
| 276 | 1982 | 5 | |
| Passionate Witch, The | Smith, Thorne | "Fiction - S. F./Fantasy"
| 0 | | | |
| Passport to Oblivion | Leasor, James | "Fiction - Adventure"
| 220 | 1964 | 5 | 2026-08-15 |
