English Fiction Prose in Project Gutenberg (125)
- Opportunities by Warner, Susan
- Opposite neighbours : $b or, The two lives, and their end by Guernsey, Lucy Ellen
- Options by Henry, O.
- Opus 21//Descriptive Music for the Lower Kinsey Epoch of the Atomic Age, a Concerto for a One-man Band, Six Arias for Soap Operas, Fugues, Anthems & Barrelhouse by Wylie, Philip
- Or Darwin, if you prefer by Hunter, Mel
- Orange and Green: A Tale of the Boyne and Limerick by Henty, G. A. (George Alfred)
- Oranges and lemons by Wemyss, Mary C. E.
- Ordeal in Space by Sloan, Ralph
- Oridin's Formula by Winterbotham, R. R. (Russell Robert)
- Orientations by Maugham, W. Somerset (William Somerset)
- Original Penny Readings: A Series of Short Sketches by Fenn, George Manville
- Original stories from real life//With conversations, calculated to regulate the affections, and form the mind to truth and goodness. by Wollstonecraft, Mary
- Oriole's daughter, a novel, Volume 1 (of 3) by Fothergill, Jessie
- Oriole's daughter, a novel, Volume 2 (of 3) by Fothergill, Jessie
- Orley Farm by Trollope, Anthony
- Orlóff and His Wife: Tales of the Barefoot Brigade by Gorky, Maksim
- Ormond; Or, The Secret Witness. Volume 1 (of 3) by Brown, Charles Brockden
- Ormond; Or, The Secret Witness. Volume 2 (of 3) by Brown, Charles Brockden
- Ormond; Or, The Secret Witness. Volume 3 (of 3) by Brown, Charles Brockden
- Orphan Dinah by Phillpotts, Eden
- Orphans of the Storm by MacMahon, Henry
- Orphans of the Void by Shaara, Michael
- Orpheus in Mayfair, and Other Stories and Sketches by Baring, Maurice
- Orrain: A Romance by Levett Yeats, S. (Sidney)
- Orville College: A Story by Wood, Henry, Mrs.
- Oscar in Africa by Castlemon, Harry
- Oscar; Or, The Boy Who Had His Own Way by Aimwell, Walter
- Osceola the Seminole; or, The Red Fawn of the Flower Land by Reid, Mayne
- Oswald Bastable and Others by Nesbit, E. (Edith)
- Oswald Cray: A Novel by Wood, Henry, Mrs.
- Oswald Langdon//or, Pierre and Paul Lanier. A Romance of 1894-1898 by Hamilton, Levi Jackson
- Other Fools and Their Doings, or, Life among the Freedmen by Goff, H. N. K. (Harriet Newell Kneeland)
- Other Main-Travelled Roads by Garland, Hamlin
- Other People's Business: The Romantic Career of the Practical Miss Dale by Smith, Harriet L. (Harriet Lummis)
- Other People's Money by Gaboriau, Emile
- Other Tales and Sketches//(From: "The Doliver Romance and Other Pieces: Tales and Sketches") by Hawthorne, Nathaniel
- Other Things Being Equal by Wolf, Emma
- Otherwise Phyllis by Nicholson, Meredith
- Othmar by Ouida
- Otto of the Silver Hand by Pyle, Howard
- Our Admirable Betty: A Romance by Farnol, Jeffery
- Our Bessie by Carey, Rosa Nouchette
- Our Casualty, and Other Stories//1918 by Birmingham, George A.
- Our Davie Pepper by Sidney, Margaret
- Our Den by Waterworth, E. M.
- Our Elizabeth: A Humour Novel by Kilpatrick, Florence A. (Florence Antoinette)
- Our Fellows; Or, Skirmishes with the Swamp Dragoons by Castlemon, Harry
- Our Friend the Charlatan by Gissing, George
- Our Home in the Silver West: A Story of Struggle and Adventure by Stables, Gordon
- Our Katie by Anonymous
- Our Lady of Darkness by Capes, Bernard
- Our Lady of the Pillar by Queirós, Eça de
- Our Little Canadian Cousin by MacDonald, Elizabeth Roberts
- Our Little Cuban Cousin by Wade, Mary Hazelton Blanchard
- Our Little Eskimo Cousin by Wade, Mary Hazelton Blanchard
- Our Little German Cousin by Wade, Mary Hazelton Blanchard
- Our Little Lady//Six Hundred Years Ago by Holt, Emily Sarah
- Our Mr. Wrenn: The Romantic Adventures of a Gentle Man by Lewis, Sinclair
- Our Mutual Friend by Dickens, Charles
- Our New Neighbors At Ponkapog by Aldrich, Thomas Bailey
- Our Next-Door Neighbors by Maniates, Belle Kanaris
- Our Nig; Or, Sketches from the Life of a Free Black, in a Two-story White House, North//Showing That Slavery's Shadows Fall Even There by Wilson, Harriet E.
- Our Own Set: A Novel by Schubin, Ossip
- Our Pilots in the Air by Brown, William Perry
- Our Pirate Hoard//1891 by Janvier, Thomas A. (Thomas Allibone)
- Our Soldier Boy by Fenn, George Manville
- Our Square and the People in It by Adams, Samuel Hopkins
- Our Town by Bixby, Jerome
- Our Village by Mitford, Mary Russell
- Our Village in War-time by Martyn, S. T. (Sarah Towne)
- Our Winnie, and The Little Match Girl by Everett-Green, Evelyn
- Our Wonderful Selves by Pertwee, Roland
- Our World; Or, the Slaveholder's Daughter by Adams, F. Colburn (Francis Colburn)
- Our Young Aeroplane Scouts in France and Belgium//Or, Saving the Fortunes of the Trouvilles by Porter, Horace
- Our Young Aeroplane Scouts in Germany; or, Winning the Iron Cross by Porter, Horace
- Our Young Aeroplane Scouts in Russia; or, Lost on the Frozen Steppes by Porter, Horace
- Our trip to Blunderland : $b or, grand excursion to Blundertown and back by Macdonald, J. H. A. (John Hay Athole)