Books by Anonymous (sorted alphabetically)
- New Mexico Magazine's A Taste of New Mexico Kitchens Anonymous
- New York Cake Book: Fifty Recipes by a Famous New York Chef Anonymous
- Ninth annual report of the St. Mary Abbott's, Kensington, Church of England District Visiting Society Anonymous
- Notable Women of Olden Time Anonymous
- Notes of hospital life from November, 1861, to August, 1863 Anonymous
- Notes on a Tour Through the Western part of The State of New York Anonymous
- Nouveau voyage en France (French) Anonymous
- Nursery Lessons, in Words of One Syllable Anonymous
- Nuts to crack: A galaxy of puzzles, riddles, conundrums, etc. Anonymous
- oak and the briony Anonymous
- Oaths, Signs, Ceremonies and Objects of the Ku-Klux-Klan. Anonymous
- oeuvre des conteurs allemands: mémoires d'une chanteuse allemande (French) Anonymous
- Old Buildings of New York, With Some Notes Regarding Their Origin and Occupants Anonymous
- Old Castle and Other Stories Anonymous
- Old Man's Story Anonymous
- Old Mill and the Covered Bridge Anonymous
- Omzwervingen door de eilandenwereld van den Grooten-oceaan (Dutch) Anonymous
- Omzwervingen door de eilandenwereld van den Grooten Oceaan: De Fidji-eilanden (Dutch) Anonymous
- Only True Mother Goose Melodies Anonymous
- Opium Eating: An Autobiographical Sketch by an Habituate Anonymous
- Oration on Charles Sumner, Addressed to Colored People Anonymous
- Ordeal of Elizabeth Anonymous
- Oriental tales, for the entertainment of youth Anonymous
- Orkneyinga Saga Anonymous
- Orthodox Daily Prayers Anonymous