- Cicely and Other StoriesAuthor: Annie F. (Annie Fellows) Johnston, Sears GallagherReleased on Project Gutenberg: September 7, 2006
- CiceroAuthor: W. Lucas (William Lucas) CollinsReleased on Project Gutenberg: March 1, 2004
- Cicero's Brutus or History of Famous Orators; also His Orator, or Accomplished Speaker.Author: Cicero, Marcus Tullius, Jones, E. [Translator]Released on Project Gutenberg: January 1, 2006
- Cicero's Tusculan Disputations: Also, Treatises On The Nature Of The Gods, And On The CommonwealthAuthor: Cicero, Marcus Tullius, Charles Duke YongeReleased on Project Gutenberg: February 9, 2005
- CinderellaAuthor: Hewet, Henry W., Thwaites, W. H. (William H.) [Illustrator]Released on Project Gutenberg: January 1, 2004
- CinderellaAuthor: AnonymousReleased on Project Gutenberg: November 3, 2007
- Cinderella in the South: Twenty-Five South African TalesAuthor: Arthur Shearly CrippsReleased on Project Gutenberg: October 5, 2007
- Cinderella, and Other StoriesAuthor: Richard Harding DavisReleased on Project Gutenberg: July 16, 2005
- Cinderella; Or, The Little Glass Slipper, and Other StoriesAuthor: AnonymousReleased on Project Gutenberg: January 1, 1999
- Cinq Mars — Volume 1Author: Alfred de VignyReleased on Project Gutenberg: April 1, 2003
- Cinq Mars — Volume 2Author: Alfred de VignyReleased on Project Gutenberg: April 1, 2003
- Cinq Mars — Volume 3Author: Alfred de VignyReleased on Project Gutenberg: April 1, 2003
- Cinq Mars — Volume 4Author: Alfred de VignyReleased on Project Gutenberg: April 1, 2003
- Cinq Mars — Volume 5Author: Alfred de VignyReleased on Project Gutenberg: April 1, 2003
- Cinq Mars — Volume 6Author: Alfred de VignyReleased on Project Gutenberg: April 1, 2003
- Cinq-MarsAuthor: Alfred de VignyReleased on Project Gutenberg: October 30, 2004
- CircusAuthor: Alan Edward NourseReleased on Project Gutenberg: October 3, 2007
- Citadel of FaithAuthor: Effendi ShoghiReleased on Project Gutenberg: September 16, 2006
- Citation and Examination of William Shakspeare, Euseby Treen, Joseph Carnaby, and Silas Gough, ClerkAuthor: Walter Savage LandorReleased on Project Gutenberg: February 1, 2004
- Citizen Bird: Scenes from Bird-Life in Plain English for BeginnersAuthor: Mabel Osgood Wright, Elliott Coues, Louis Agassiz FuertesReleased on Project Gutenberg: April 1, 2004
- Citizenship: A Manual for VotersAuthor: Emma Guy CromwellReleased on Project Gutenberg: May 25, 2008
- City of Endless NightAuthor: Milo HastingsReleased on Project Gutenberg: February 1, 2006
- Civics and HealthAuthor: William H. (WIlliam Harvey) Allen, W. T. (William Thompson) SedgwickReleased on Project Gutenberg: May 8, 2007
- Civics: as Applied SociologyAuthor: Geddes, Patrick, SirReleased on Project Gutenberg: August 17, 2004
- Civil Government for Common Schools: Prepared as a Manual for Public Instruction in the State of New YorkAuthor: Northam, Henry C.Released on Project Gutenberg: February 1, 2004
- Civil Government in the United States Considered with Some Reference to Its OriginsAuthor: John FiskeReleased on Project Gutenberg: February 1, 2004
- Civil Government of Virginia: A Text-book for Schools Based Upon the Constitution of 1902 and Conforming to the Laws Enacted in Accordance TherewithAuthor: William Fayette FoxReleased on Project Gutenberg: December 1, 2003
- Civilization and Beyond: Learning from HistoryAuthor: Scott NearingReleased on Project Gutenberg: May 1, 2004
- Civilization: Tales of the OrientAuthor: Ellen N. (Ellen Newbold) La MotteReleased on Project Gutenberg: November 24, 2006
- Clair de Lune: A Play in Two Acts and Six ScenesAuthor: Strange, MichaelReleased on Project Gutenberg: October 30, 2007
- Clairvoyance and Occult PowersAuthor: William Walker AtkinsonReleased on Project Gutenberg: May 1, 2004
- Clara A. Swain, M.D.Author: Hoskins, Robert, Mrs.Released on Project Gutenberg: November 11, 2004
- Clara HopgoodAuthor: William Hale WhiteReleased on Project Gutenberg: June 1, 2004
- Clara Maynard; Or, The True and the False: A Tale of the TimesAuthor: William Henry Giles KingstonReleased on Project Gutenberg: October 17, 2007
- Clare Avery: A Story of the Spanish ArmadaAuthor: Emily Sarah HoltReleased on Project Gutenberg: October 11, 2007
- ClarenceAuthor: Bret HarteReleased on Project Gutenberg: May 22, 2006
- ClarimondeAuthor: Théophile Gautier, Lafcadio HearnReleased on Project Gutenberg: September 18, 2007
- Clarissa Harlowe; or the history of a young lady — Volume 1Author: Samuel RichardsonReleased on Project Gutenberg: November 1, 2005
- Clarissa Harlowe; or the history of a young lady — Volume 2Author: Samuel RichardsonReleased on Project Gutenberg: January 1, 2006
- Clarissa Harlowe; or the history of a young lady — Volume 3Author: Samuel RichardsonReleased on Project Gutenberg: February 1, 2006
- Clarissa Harlowe; or the history of a young lady — Volume 4Author: Samuel RichardsonReleased on Project Gutenberg: December 1, 2003
- Clarissa Harlowe; or the history of a young lady — Volume 5Author: Samuel RichardsonReleased on Project Gutenberg: January 1, 2004
- Clarissa Harlowe; or the history of a young lady — Volume 6Author: Samuel RichardsonReleased on Project Gutenberg: February 1, 2004
- Clarissa Harlowe; or the history of a young lady — Volume 7Author: Samuel RichardsonReleased on Project Gutenberg: April 1, 2004
- Clarissa Harlowe; or the history of a young lady — Volume 8Author: Samuel RichardsonReleased on Project Gutenberg: April 1, 2004
- Clarissa Harlowe; or the history of a young lady — Volume 9Author: Samuel RichardsonReleased on Project Gutenberg: May 1, 2004
- Class of '29Author: Lashin, Orrie, Milo HastingsReleased on Project Gutenberg: November 14, 2005
- Classic French Course in EnglishAuthor: William Cleaver WilkinsonReleased on Project Gutenberg: October 14, 2007
- Classic MythsAuthor: Mary Catherine Judd, MacDonall, Angus [Illustrator]Released on Project Gutenberg: February 1, 2006
- ClaverhouseAuthor: Mowbray MorrisReleased on Project Gutenberg: April 25, 2006
- ClayhangerAuthor: Arnold BennettReleased on Project Gutenberg: April 28, 2007
- Clear CrystalsAuthor: Beede, Clara Frances McKeeReleased on Project Gutenberg: February 28, 2005
- Cleek: the Man of the Forty FacesAuthor: Thomas W. HanshewReleased on Project Gutenberg: December 12, 2004
- ClemenceAuthor: Babcock, Retta B.Released on Project Gutenberg: March 4, 2006
- ClementinaAuthor: A. E. W. (Alfred Edward Woodley) Mason, Bernard PartridgeReleased on Project Gutenberg: October 1, 2004
- CleopatraAuthor: H. Rider (Henry Rider) HaggardReleased on Project Gutenberg: March 28, 2006
- CleopatraAuthor: Jacob AbbottReleased on Project Gutenberg: February 1, 2004
- Cleopatra — CompleteAuthor: Georg Ebers, Mary J. (Mary Joanna) SaffordReleased on Project Gutenberg: November 15, 2004
- Cleopatra — Volume 01Author: Georg Ebers, Mary J. (Mary Joanna) SaffordReleased on Project Gutenberg: April 1, 2004
- Cleopatra — Volume 02Author: Georg Ebers, Mary J. (Mary Joanna) SaffordReleased on Project Gutenberg: April 1, 2004