Wikipedia:WikiProject Books/List of books by title: O

Oa-Ol

 * Oahspe - John Ballou Newbrough (1882)
 * The Objectivity of the Sociological and Social-Political Knowledge - Maximilian Weber
 * Oblomov - Ivan Goncharov (1858)
 * Obras Completas - Jorge Luis Borges (1989)
 * L'Obsédante obèse et autres agressions - Gilles Archambault (1987)
 * Obsidian Butterfly - Laurell K. Hamilton
 * Oceanic and Other Stories - Greg Egan
 * The October Country - Ray Bradbury (1955)
 * October Surprise - Gary Sick (1980)
 * Octopussy and The Living Daylights - Ian Fleming (1966)
 * The Odessa File - Frederick Forsyth (1972)
 * Odyssey - Homer
 * Oedipus Rex - Sophocles
 * Of Mice and Men - John Steinbeck
 * Official Handbook of the Marvel Universe (1982)
 * Oh My Darling Daughter - Eric Malpass (1970)
 * An Old Captivity - Nevil Shute
 * An Old Chair - Alamgir Hashmi (1979)
 * The Old Curiosity Shop - Charles Dickens (1841)
 * The Old Devils - Kingsley Amis (1986)
 * The Old Man and the Sea - Ernest Hemingway (1952)
 * The Old Men at the Zoo - Angus Wilson (1961)
 * The Old Straight Track - Alfred Watkins (1925)
 * Old Possum's Book of Practical Cats - T. S. Eliot (1939)
 * Oliver Twist - Charles Dickens (1839)
 * Oliver's Story - Erich Segal (1977)

Om-Op

 * Les Ombres Errantes - Pascal Quignard (2002)
 * Omertà - Mario Puzo (2000)
 * On Her Majesty's Secret Service - Ian Fleming (1963)
 * On Liberty - John Stuart Mill
 * On the Beach - Nevil Shute (1957)
 * On The Black Hill - Bruce Chatwin (1982)
 * On the Breath of the Gods - Ariel Tomioka 1974
 * On the Nature of Things - Lucretius
 * On the Road - Jack Kerouac (1957)
 * On Wings of a Dragon - Cora Taylor
 * On Wings of Eagles - Ken Follett (1983)
 * The Once and Future King - T.H. White (1958)
 * Once in a Blue Moon - Magnus Mills (2003)
 * Once Is Not Enough - Jacqueline Susann (1973)
 * One - David Karp (1953)
 * One - Richard Bach (1988)
 * One Arranged Murder - Chetan Bhagat (2020)
 * One Day in the Life of Ivan Denisovich - Alexander Solzhenitsyn
 * One Door Away from Heaven - Dean R. Koontz (2002)
 * One Flew Over the Cuckoo's Nest - Ken Kesey (1962)
 * One Hundred Years of Solitude - Gabriel García Márquez (1967)
 * One Indian Girl - Chetan Bhagat (2016)
 * One Man and His Bog - Barry Pilton (1986)
 * One Night at the Call Centre - Chetan Bhagat (2005)
 * One of Ours - Willa Cather (1922)
 * One of the Guys - Robert Clark Young (1999)
 * One Winter in Eden - Michael Bishop (1984)
 * Onion John - Joseph Krumgold, (1961 Newbery Medal)
 * Only the Ball was White - Robert W. Peterson (1970)
 * The Opener of the Way - Robert Bloch (1945)
 * Opus 100 (1969)

Or-Ot

 * The Oracle Encyclopædia (1895)
 * Orange Book (TCSEC - Trusted Computer System Evaluation Criteria), computer security standards
 * The Orchard on Fire - Shena Mackay (1995)
 * Ordeal of the Union series - Allan Nevins 1947-1971
 * Oregon Geographic Names - Lewis L. McArthur (2003)
 * The Oriental Christ - Protap Chunder Mozoomdar (1883)
 * The Origin of Species (On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life.) - Charles Darwin (1859)
 * The Original Text Solar Pons Omnibus Edition - August Derleth (2000)
 * The Origins of France: Clovis to the Capetians 500-1000 - Edward James (1982)
 * Orley Farm - Anthony Trollope (1862)
 * Orphans of the Sky - Robert A. Heinlein (1963)
 * Oryx and Crake - Margaret Atwood (2003)
 * Oscar and Lucinda - Peter Carey (1988) - winner of the Booker Prize
 * The Osterman Weekend - Robert Ludlum (1972)
 * Other Dimensions - Clark Ashton Smith (1970)
 * The Other Side of Midnight - Sidney Sheldon (1974)
 * Other Worlds Than Ours - Nelson Bond (2005)
 * The Other - Thomas Tyron (1971)
 * El otoño del patriarca (The Autumn of the Patriarch) - Gabriel García Márquez (1975)

Ou-Oz

 * Our Fathers - Andrew O'Hagan (1999)
 * Our Game - John le Carré (1995)
 * Our Lady of Chernobyl - Greg Egan
 * Our Man in Havana - Graham Greene (1958)
 * Our World in Space - Isaac Asimov (1974)
 * Out of Nowhere - Ouida Sebestyen
 * Out of Space and Time - Clark Ashton Smith (1942)
 * Out of the Dust - Keran Hess, (1998 Newbery Medal)
 * Out of the Shelter - David Lodge (1970)
 * Out of the Silent Planet - C. S. Lewis
 * The Outline of History - H. G. Wells (1919)
 * The Outsider (or The Stranger) - Albert Camus (1942)
 * The Outsider - Howard Fast (1984)
 * The Outsider and Others - H.P. Lovecraft (1939)
 * Outsourcing the American Dream - Christopher M. England (2001)
 * Oval Memory - Enrique Moya (2001)
 * Over the Edge - edited by August Derleth (1964)
 * Overload - Arthur Hailey (1979)
 * The Overloaded Man - J. G. Ballard (1967)
 * The Owl in the Attic and Other Perplexities - James Thurber (1931)
 * Oxford Book of Twentieth Century English Verse - edited by Philip Larkin (1973)
 * Oxford Classical Dictionary (1949)
 * The Oxford Companion to Chess (1984) - David Vincent Hooper & Kenneth Whyld
 * Oxford Companion to Classical Literature - Paul Harvey
 * The Oxford Companion to Food (1999) - Alan Davidson
 * Oxford English Dictionary
 * Oxygen - John B. Olson and Randall S. Ingermanson (2001)
 * Oxygen - Andrew Miller (2001)
 * Oyster - Janette Turner Hospital (1996)