O Brother, Where Art Thou? (2000) - Homer (The Odyssey)
O Jerusalem (2007) - Larry Collins
The Object of My Affection (1998) - Stephen McCauley
An Occasional Hell (1996) - Randall Silvis
October Sky (1999) - Homer H. Hickman (Rocket Boys: A Memoir)
Of Love and Shadows (1994) - Isabel Allende
Of Mice and Men (1992) - John Steinbeck
Of Unknown Origin (1983) - Chauncey G. Parker
Oliver Twist (2005) - Charles Dickens (The Adventures of Oliver Twist)
Once Upon a Time in America (1984) - Harry Grey (The Hoods)
Once Upon a Time When We Were Colored (1995) - Clifton L. Taulbert
Once Were Warriors (1994) - Alan Duff
One Flew Over the Cuckoo's Nest (1975) - Ken Kesey
One True Thing (1998) - Anna Quindlen
Open Range (2003) - Lauran Paine (The Open Range Men)
Ordeal by Innocence (1984) - Agatha Christie
Ordinary People (1980) - Judith Guest
Orlando (1992) - Virginia Woolf
Oscar and Lucinda (1997) - Peter Carey
The Osterman Weekend (1983) - Robert Ludlum
The Other Boleyn Girl (2008) - Philippa Gregory
The Other Side of Heaven (2001) - John H. Groberg (In the Eye of the Storm)
Out (1982) - Ronald Sukenick
Out of Africa (1985) - Isak Dinesen
Out of Sight (1998) - Elmore Leonard
Outlaw of Gor (1989) - John Norman
Outside Providence (1999) - Peter Farrelly
The Outsiders (1983) - S.E. Hinton
Over the Hill (1992) - Gladys Taylor (Alone in the Australian Outback)