- The Ocean Cat's Paw: The Story of a Strange CruiseAuthor: George Manville Fenn, W. S. (Walter S.) StaceyLanguage: English
- The Octopus : A Story of CaliforniaAuthor: Frank NorrisLanguage: English
- The Odd WomenAuthor: George GissingLanguage: English
- The Odds: And Other StoriesAuthor: Ethel M. (Ethel May) DellLanguage: English
- The Old Curiosity ShopAuthor: Charles DickensLanguage: English
- The Old English Baron: a Gothic StoryAuthor: Clara ReeveLanguage: English
- The Old Flute-Player: A Romance of To-dayAuthor: Edward Marshall, Charles Turner Dazey, Hare, J. Knowles [Illustrator], Clarence RoweLanguage: English
- The Old Folks' Party: 1898Author: Edward BellamyLanguage: English
- The Old Gray HomesteadAuthor: Frances Parkinson KeyesLanguage: English
- The Old HomesteadAuthor: Ann S. (Ann Sophia) StephensLanguage: English
- The Old Peabody Pew: A Christmas Romance of a Country ChurchAuthor: Kate Douglas Smith WigginLanguage: English
- The Old Stone HouseAuthor: Constance Fenimore WoolsonLanguage: English
- The Old Wives' TaleAuthor: Arnold BennettLanguage: English
- The One Moss-RoseAuthor: Philip Bennett PowerLanguage: English
- The One Woman: A Story of Modern UtopiaAuthor: Dixon, Thomas, Jr.Language: English
- The Opal SerpentAuthor: Fergus HumeLanguage: English
- The Open Door, and the Portrait.: Stories of the Seen and the Unseen.Author: Mrs. (Margaret) OliphantLanguage: English
- The Opened Shutters: A NovelAuthor: Clara Louise Burnham, Harrison FisherLanguage: English
- The Opinions of a PhilosopherAuthor: Robert GrantLanguage: English
- The Orange-Yellow DiamondAuthor: J. S. (Joseph Smith) FletcherLanguage: English
- The Ordeal of Richard Feverel — CompleteAuthor: George MeredithLanguage: English
- The Ordeal of Richard Feverel — Volume 1Author: George MeredithLanguage: English
- The Ordeal of Richard Feverel — Volume 2Author: George MeredithLanguage: English
- The Ordeal of Richard Feverel — Volume 3Author: George MeredithLanguage: English
- The Ordeal of Richard Feverel — Volume 4Author: George MeredithLanguage: English
- The Ordeal of Richard Feverel — Volume 5Author: George MeredithLanguage: English
- The Ordeal of Richard Feverel — Volume 6Author: George MeredithLanguage: English
- The Ordeal: A Mountain Romance of TennesseeAuthor: Charles Egbert Craddock, Douglas DuerLanguage: English
- The Other GirlsAuthor: A. D. T. (Adeline Dutton Train) WhitneyLanguage: English
- The Other Side of the DoorAuthor: Lucia Chamberlain, Herman PfeiferLanguage: English
- The OutcastsAuthor: William Alexander Fraser, Arthur HemingLanguage: English
- The OutcryAuthor: Henry JamesLanguage: English
- The Outdoor Chums After Big Game; Or, Perilous Adventures in the WildernessAuthor: Allen, QuincyLanguage: English
- The Outdoor Chums at Cabin Point; Or, The Golden Cup MysteryAuthor: Allen, QuincyLanguage: English
- The Outdoor Chums; Or, The First Tour of the Rod, Gun and Camera ClubAuthor: Allen, QuincyLanguage: English
- The Outdoor Girls at Bluff Point; Or a Wreck and a RescueAuthor: Hope, Laura LeeLanguage: English
- The Outdoor Girls at Ocean View; Or, The Box That Was Found in the SandAuthor: Hope, Laura LeeLanguage: English
- The Outdoor Girls at Rainbow Lake; Or, The Stirring Cruise of the Motor Boat GemAuthor: Hope, Laura LeeLanguage: English
- The Outdoor Girls at the Hostess House; Or, Doing Their Best for the SoldiersAuthor: Hope, Laura LeeLanguage: English
- The Outdoor Girls at Wild Rose Lodge; Or, The Hermit of Moonlight FallsAuthor: Hope, Laura LeeLanguage: English
- The Outdoor Girls at Wild Rose Lodge; or, the Hermit of Moonlight FallsAuthor: Hope, Laura LeeLanguage: English
- The Outdoor Girls in a Motor Car; Or, The Haunted Mansion of Shadow ValleyAuthor: Hope, Laura LeeLanguage: English
- The Outdoor Girls in a Winter Camp: Or, Glorious Days on Skates and Ice BoatsAuthor: Hope, Laura LeeLanguage: English
- The Outdoor Girls in Florida; Or, Wintering in the Sunny SouthAuthor: Hope, Laura LeeLanguage: English
- The Outdoor Girls in the Saddle; Or, The Girl Miner of Gold RunAuthor: Hope, Laura LeeLanguage: English
- The Outdoor Girls on Pine Island; Or, A Cave and What It ContainedAuthor: Hope, Laura LeeLanguage: English
- The Pacha of Many TalesAuthor: Frederick MarryatLanguage: English
- The PagansAuthor: Arlo BatesLanguage: English
- The Palace Beautiful: A Story for GirlsAuthor: L. T. MeadeLanguage: English
- The Palace of Darkened WindowsAuthor: Mary Hastings Bradley, Edmund FrederickLanguage: English
- The Paradise MysteryAuthor: J. S. (Joseph Smith) FletcherLanguage: English
- The Parasite: A StoryAuthor: Arthur Conan DoyleLanguage: English
- The Parisians — CompleteAuthor: Lytton, Edward Bulwer Lytton, BaronLanguage: English
- The Parisians — Volume 01Author: Lytton, Edward Bulwer Lytton, BaronLanguage: English
- The Parisians — Volume 02Author: Lytton, Edward Bulwer Lytton, BaronLanguage: English
- The Parisians — Volume 03Author: Lytton, Edward Bulwer Lytton, BaronLanguage: English
- The Parisians — Volume 04Author: Lytton, Edward Bulwer Lytton, BaronLanguage: English
- The Parisians — Volume 05Author: Lytton, Edward Bulwer Lytton, BaronLanguage: English
- The Parisians — Volume 06Author: Lytton, Edward Bulwer Lytton, BaronLanguage: English
- The Parisians — Volume 07Author: Lytton, Edward Bulwer Lytton, BaronLanguage: English