- Mary at the farm, and book of recipes compiled during her visit among the "Pennsylvania Germans"Author: Edith M. (Edith May) ThomasReleased on Project Gutenberg: September 27, 2004
- Mary BartonAuthor: Elizabeth Cleghorn GaskellReleased on Project Gutenberg: April 1, 2000
- Mary Cary: "Frequently Martha"Author: Kate Langley BosherReleased on Project Gutenberg: April 6, 2005
- Mary ErskineAuthor: Jacob AbbottReleased on Project Gutenberg: December 26, 2004
- Mary GrayAuthor: Katharine Tynan, C. H. (Charles H.) TaffsReleased on Project Gutenberg: December 27, 2006
- Mary Jane: Her BookAuthor: Clara Ingram Judson, White, Frances [Illustrator]Released on Project Gutenberg: September 1, 2005
- Mary Jane—Her VisitAuthor: Clara Ingram Judson, White, Frances [Illustrator]Released on Project Gutenberg: May 31, 2005
- Mary Liddiard; Or, The Missionary's DaughterAuthor: William Henry Giles KingstonReleased on Project Gutenberg: October 25, 2007
- Mary LouiseAuthor: L. Frank (Lyman Frank) BaumReleased on Project Gutenberg: May 1, 2004
- Mary Louise and Josie O'GormanAuthor: Emma Speed SampsonReleased on Project Gutenberg: September 7, 2007
- Mary Louise and the Liberty GirlsAuthor: L. Frank (Lyman Frank) Baum, Carsey, Alice [Illustrator]Released on Project Gutenberg: June 20, 2007
- Mary Louise in the CountryAuthor: L. Frank (Lyman Frank) Baum, J. Allen (James Allen) St. JohnReleased on Project Gutenberg: August 3, 2007
- Mary Louise Solves a MysteryAuthor: L. Frank (Lyman Frank) BaumReleased on Project Gutenberg: February 11, 2008
- Mary MarieAuthor: Eleanor H. (Eleanor Hodgman) PorterReleased on Project Gutenberg: February 1, 2004
- Mary MarstonAuthor: George MacDonaldReleased on Project Gutenberg: June 1, 2005
- Mary Minds Her BusinessAuthor: George WestonReleased on Project Gutenberg: July 27, 2004
- Mary Olivier: a LifeAuthor: May SinclairReleased on Project Gutenberg: November 1, 2005
- Mary Powell & Deborah's DiaryAuthor: Anne ManningReleased on Project Gutenberg: May 14, 2007
- Mary Rose of MifflinAuthor: Frances R. (Frances Roberta) Sterrett, Maginel Wright BarneyReleased on Project Gutenberg: July 10, 2007
- Mary S. Peake: The Colored Teacher at Fortress MonroeAuthor: Lewis C. (Lewis Conger) LockwoodReleased on Project Gutenberg: March 4, 2007
- Mary Schweidler, the amber witch: The most interesting trial for witchcraft ever known, printed from an imperfect manuscript by her father, Abraham Schweidler, the pastor of Coserow in the island of Usedom / edited by W. Meinhold ; translated from the German by Lady Duff Gordon.Author: Wilhelm Meinhold, Duff Gordon, Lucie, LadyReleased on Project Gutenberg: August 1, 2005
- Mary Slessor of Calabar: Pioneer MissionaryAuthor: W. P. (William Pringle) LivingstoneReleased on Project Gutenberg: September 1, 2005
- Mary Stuart: Celebrated CrimesAuthor: Alexandre DumasReleased on Project Gutenberg: September 22, 2004
- Mary Stuart: A TragedyAuthor: Friedrich Schiller, Joseph Charles MellishReleased on Project Gutenberg: December 8, 2004
- Mary Ware's Promised LandAuthor: Annie F. (Annie Fellows) Johnston, John GossReleased on Project Gutenberg: January 10, 2008
- Mary WollastonAuthor: Henry Kitchell WebsterReleased on Project Gutenberg: February 1, 2004
- Mary WollstonecraftAuthor: Elizabeth Robins PennellReleased on Project Gutenberg: September 29, 2007
- Mary's Meadow, and Other Tales of Fields and FlowersAuthor: Juliana Horatia EwingReleased on Project Gutenberg: October 27, 2006
- Mary's RainbowAuthor: ClementiaReleased on Project Gutenberg: December 26, 2006
- Mary, MaryAuthor: James Stephens, Padraic ColumReleased on Project Gutenberg: March 3, 2008
- Mary-'GustaAuthor: Joseph Crosby LincolnReleased on Project Gutenberg: May 17, 2006
- Mary: A FictionAuthor: Mary WollstonecraftReleased on Project Gutenberg: July 24, 2005
- Marzio's Crucifix, and ZoroasterAuthor: F. Marion (Francis Marion) Crawford, Fletcher C. (Fletcher Charles) RansomReleased on Project Gutenberg: September 18, 2005
- Masques & PhasesAuthor: Robert Baldwin RossReleased on Project Gutenberg: January 24, 2006
- Mass' George: A Boy's Adventures in the Old SavannahAuthor: George Manville Fenn, Smith, W. T. [Illustrator]Released on Project Gutenberg: May 4, 2007
- Massacre at ParisAuthor: Christopher MarloweReleased on Project Gutenberg: October 1, 1998
- Massacres of the South (1551-1815): Celebrated CrimesAuthor: Alexandre DumasReleased on Project Gutenberg: September 22, 2004
- Massimilla DoniAuthor: Honoré de Balzac, Clara Bell, Waring, James [Translator]Released on Project Gutenberg: March 12, 2005
- Master and ManAuthor: Tolstoy, Leo, graf, Aylmer Maude, Louise MaudeReleased on Project Gutenberg: February 5, 2006
- Master Humphrey's ClockAuthor: Charles DickensReleased on Project Gutenberg: July 1, 1996
- Master of His FateAuthor: J. Maclaren (James Maclaren) CobbanReleased on Project Gutenberg: November 3, 2004
- Master Olof: A Drama in Five ActsAuthor: August Strindberg, Edwin BjörkmanReleased on Project Gutenberg: January 1, 2005
- Master Skylark: A Story of Shakspere's TimeAuthor: John Bennett, Reginald B. (Reginald Bathurst) BirchReleased on Project Gutenberg: March 1, 2004
- Master SunshineAuthor: Fraser, C. F., Mrs.Released on Project Gutenberg: October 1, 2003
- Master Tales of Mystery, Volume 3Author: Francis J. (Francis Joseph) ReynoldsReleased on Project Gutenberg: April 1, 2004
- Masterman ReadyAuthor: Frederick MarryatReleased on Project Gutenberg: August 1, 1998
- Masterman Ready; Or, The Wreck of the "Pacific"Author: Frederick MarryatReleased on Project Gutenberg: May 21, 2007
- Masterpieces of American Wit and HumorAuthor: Thomas L. MassonReleased on Project Gutenberg: August 1, 2004
- Masterpieces of Mystery in Four Volumes: Mystic-Humorous StoriesAuthor: Joseph Lewis FrenchReleased on Project Gutenberg: November 10, 2007
- Masterpieces of Negro Eloquence: The Best Speeches Delivered by the Negro from the days of: Slavery to the Present TimeAuthor: Alice Moore Dunbar-NelsonReleased on Project Gutenberg: August 4, 2007
- Masters of spaceAuthor: Walter Kellogg TowersReleased on Project Gutenberg: May 1, 2004
- Masters of SpaceAuthor: E. E. (Edward Elmer) Smith, E. Everett (Edward Everett) Evans, Berry, Phil [Illustrator]Released on Project Gutenberg: September 24, 2007
- Masters of the English Novel: A Study of Principles and PersonalitiesAuthor: Richard BurtonReleased on Project Gutenberg: June 25, 2004
- Masters of the GuildAuthor: Louise LampreyReleased on Project Gutenberg: May 1, 2004
- Masters of the Wheat-LandsAuthor: Harold Bindloss, Cyrus CuneoReleased on Project Gutenberg: June 28, 2008
- Masters of Water-Colour PaintingAuthor: C. Geoffrey (Charles Geoffrey) Holme, H. M. (Herbert Minton) CundallReleased on Project Gutenberg: August 23, 2007
- Mastery of Self for Wealth, Power, SuccessAuthor: Frank C. (Frank Channing) HaddockReleased on Project Gutenberg: July 1, 2003
- Mates at BillabongAuthor: Mary Grant BruceReleased on Project Gutenberg: May 1, 2003
- Mathematical Essays and RecreationsAuthor: Hermann Schubert, Thomas J. (Thomas Joseph) McCormackReleased on Project Gutenberg: May 9, 2008
- MathildaAuthor: Mary Wollstonecraft ShelleyReleased on Project Gutenberg: March 2, 2005