Books about Short stories, American (sorted alphabetically)
- O. Henryana: Seven Odds and Ends, Poetry and Short Stories O. Henry
- O. Henry Encore O. Henry
- Old Friends and New Sarah Orne Jewett
- Old Judge Priest Irvin S. Cobb
- Old Mission Stories of California Charles Franklin Carter
- One thousand dollars a day. Studies in practical economics Adeline Knapp
- On Picket Duty, and Other Tales Louisa May Alcott
- On Secret Service William Nelson Taft
- Open Boat and Other Stories Stephen Crane
- Open Window: Tales of the Months Mabel Osgood Wright
- Options O. Henry
- Other Fellow Francis Hopkinson Smith
- Overland Tales Josephine Clifford
- Over the border Morgan Robertson
- Papers from Overlook-House Frederic W. Beasley
- Parenticide Club Ambrose Bierce
- Parenticide Club Ambrose Bierce
- Peace in Friendship Village Zona Gale
- Pencil Sketches; or, Outlines of Character and Manners Eliza Leslie
- play that won Ralph Henry Barbour
- Poker Jim, Gentleman, and Other Tales and Sketches G. Frank Lydston
- Portland, Oregon, A.D. 1999, and other sketches J. W. Hayes
- Postmark Ganymede Robert Silverberg
- Postscripts O. Henry
- Praying Skipper, and Other Stories Ralph Delahaye Paine