Encyclopedias, Almanacs, Transcripts, and Maps
- Of Human Bondage
- Of Mice and Men
- Okigbo, Christopher
- Old Red by Caroline Gordon, 1963
- Oliphant, Margaret
- Oliver Twist
- Olszewski, Krystyn
- On Both Sides of the Wall (Fun Beyde Zaytn Geto-Moyer)
- On the Western Circuit by Thomas Hardy, 1894
- One Day in the Life of Ivan Denisovich
- One Day in the Life of Ivan Denisovich (Odin den' Ivana Denisovicha) by Aleksandr Solzhenitsyn, 1962
- One Destiny: An Epistle to the Christians
- One Flew over the Cuckoo’s Nest
- One Generation after (Entre Deux Soleils)
- One Hundred Years of Solitude
- Onetti, Juan Carlos
- Onetti, Juan Carlos
- Operation Shylock: A Confession
- Ordinary People
- Örkény, István