- Old Greek StoriesAuthor: James BaldwinLanguage: English
- Old Indian DaysAuthor: Charles A. EastmanLanguage: English
- Old Indian LegendsAuthor: Zitkala-SaLanguage: English
- Old Jabe's Marital Experiments: 1908Author: Thomas Nelson PageLanguage: English
- Old JackAuthor: William Henry Giles KingstonLanguage: English
- Old John Brown, the man whose soul is marching onAuthor: Hawkins, WalterLanguage: English
- Old JunkAuthor: H. M. (Henry Major) Tomlinson, S. K. (Samuel Kerkham) RatcliffeLanguage: English
- Old KaskaskiaAuthor: Mary Hartwell CatherwoodLanguage: English
- Old Lady Mary: A Story of the Seen and the UnseenAuthor: Mrs. (Margaret) OliphantLanguage: English
- Old Lady Number 31Author: Louise ForsslundLanguage: English
- Old Love Stories RetoldAuthor: Richard Le GallienneLanguage: English
- Old Mackinaw; Or, The Fortress of the Lakes and its SurroundingsAuthor: W. P. (William Peter) StricklandLanguage: English
- Old Man Savarin, and Other StoriesAuthor: Edward William ThomsonLanguage: English
- Old Mission Stories of CaliforniaAuthor: Charles Franklin CarterLanguage: English
- Old Mortality, CompleteAuthor: Walter ScottLanguage: English
- Old Mortality, Volume 1.Author: Walter ScottLanguage: English
- Old Mortality, Volume 2.Author: Walter ScottLanguage: English
- Old Mother Hubbard and Her DogAuthor: UnknownLanguage: English
- Old Mother West WindAuthor: Thornton W. (Thornton Waldo) BurgessLanguage: English
- Old Mr. WileyAuthor: Greye La SpinaLanguage: English
- Old News: (From: "The Snow Image and Other Twice-Told Tales")Author: Nathaniel HawthorneLanguage: English
- Old Peter's Russian TalesAuthor: Arthur Ransome, Dmitrii Isidorovich MitrokhinLanguage: English
- Old Portraits and Modern Sketches: Part 1 from Volume VI of The Works of John Greenleaf WhittierAuthor: John Greenleaf WhittierLanguage: English
- Old Rail Fence Corners: The A. B. C's. of Minnesota HistoryAuthor: Lucy Leavenworth Wilder MorrisLanguage: English
- Old Rose and SilverAuthor: Myrtle ReedLanguage: English
- Old Saint Paul's: A Tale of the Plague and the FireAuthor: William Harrison AinsworthLanguage: English
- Old Scores and New Readings: Discussions on Music & Certain MusiciansAuthor: John F. RuncimanLanguage: English
- Old Spookses' Pass, Malcolm's Katie, and other poemsAuthor: Isabella Valancy CrawfordLanguage: English
- Old St. Paul's CathedralAuthor: William BenhamLanguage: English
- Old Testament legendsAuthor: M. R. (Montague Rhodes) JamesLanguage: English
- Old Ticonderoga, a Picture of the Past: (From: "The Snow Image and Other Twice-Told Tales")Author: Nathaniel HawthorneLanguage: English
- Old Times at OtterbourneAuthor: Charlotte M. (Charlotte Mary) YongeLanguage: English
- Old valentinesAuthor: Munson Aldrich Havens, Griswold TyngLanguage: English
- Old-Fashioned Fairy TalesAuthor: Juliana Horatia EwingLanguage: English
- Old-Time Makers of Medicine: The Story of The Students And Teachers of the Sciences Related to Medicine During the Middle AgesAuthor: James J. (James Joseph) WalshLanguage: English
- Oldport DaysAuthor: Thomas Wentworth HigginsonLanguage: English
- Oldtown Fireside StoriesAuthor: Harriet Beecher StoweLanguage: English
- Ole Mammy's TormentAuthor: Annie F. (Annie Fellows) Johnston, Mary G. Johnston, Amy M. (Amy Maria) SackerLanguage: English
- Olive: A NovelAuthor: Dinah Maria Mulock Craik, G. (Georgina) BowersLanguage: English
- Oliver Cromwell: A PlayAuthor: John DrinkwaterLanguage: English
- Oliver Goldsmith: A BiographyAuthor: Washington IrvingLanguage: English
- Oliver TwistAuthor: Charles DickensLanguage: English
- Oliver TwistAuthor: Charles DickensLanguage: French
- Oliver Wendell Holmes (from Literary Friends and Acquaintance)Author: William Dean HowellsLanguage: English
- Olivia in IndiaAuthor: O. DouglasLanguage: English
- Olivia oder Die unsichtbare LampeAuthor: Jakob WassermannLanguage: German
- Olla PodridaAuthor: Frederick MarryatLanguage: English
- Olviretki Schleusingenissä; Leo ja Liina; AlmaAuthor: Aleksis KiviLanguage: Finnish
- Olympian NightsAuthor: John Kendrick BangsLanguage: English
- Om en door den Peloponnesus: De Aarde en haar Volken, 1909Author: Jandin, B. deLanguage: Dutch
- Om utvandringen, dess betydelse och orsaker: Föredrag, hållet i Stockholm den 25 och den 28 November samt i Upsala den 3 December 1881Author: Knut WicksellLanguage: Swedish
- Om viljans frihet: Ett föredragAuthor: Frans von SchéeleLanguage: Swedish
- Omaha Dwellings, Furniture and Implements: Thirteenth Annual Report of the Beaurau of American Ethnology to the Secretary of the Smithsonian Institution 1891-1892, Government Printing Office, Washington, 1896, pages 263-288Author: James Owen DorseyLanguage: English
- Omatunto: SaaristokertomusAuthor: Juhani AhoLanguage: Finnish
- Omhoog in het luchtruim! Praatje over het luchtvaartvraagstuk: De Aarde en haar Volken, 1908Author: Frederike van UildriksLanguage: Dutch
- OmnilingualAuthor: H. Beam Piper, Kelly FreasLanguage: English
- Omoo: Adventures in the South SeasAuthor: Herman MelvilleLanguage: English
- Omzwervingen door de eilandenwereld van den Grooten Oceaan: De Fidji-eilanden: De Aarde en haar Volken, 1888Author: AnonymousLanguage: Dutch
- Omzwervingen door de eilandenwereld van den Grooten-oceaan: De Aarde en haar Volken, 1887Author: AnonymousLanguage: Dutch
- On a Dynamical Top, for exhibiting the phenomena of the motion of a system of invariable form about a fixed point, with some suggestions as to the Earth's motionAuthor: James Clerk MaxwellLanguage: English