- Coniston — Volume 01Author: Winston ChurchillReleased on Project Gutenberg: October 17, 2004
- Coniston — Volume 02Author: Winston ChurchillReleased on Project Gutenberg: October 17, 2004
- Coniston — Volume 03Author: Winston ChurchillReleased on Project Gutenberg: October 17, 2004
- Coniston — Volume 04Author: Winston ChurchillReleased on Project Gutenberg: October 17, 2004
- Conjuror's House: A Romance of the Free ForestAuthor: Stewart Edward WhiteReleased on Project Gutenberg: April 11, 2006
- Connor Magan's Luck and Other StoriesAuthor: M. T. W.Released on Project Gutenberg: August 21, 2005
- Consanguineous Marriages in the American PopulationAuthor: George B. Louis (George Byron Louis) ArnerReleased on Project Gutenberg: July 20, 2004
- ConscienceAuthor: Eliza Lee Cabot FollenReleased on Project Gutenberg: May 1, 2003
- Conscience — CompleteAuthor: Hector MalotReleased on Project Gutenberg: October 30, 2004
- Conscience — Volume 1Author: Hector MalotReleased on Project Gutenberg: April 1, 2003
- Conscience — Volume 2Author: Hector MalotReleased on Project Gutenberg: April 1, 2003
- Conscience — Volume 3Author: Hector MalotReleased on Project Gutenberg: April 1, 2003
- Conscience — Volume 4Author: Hector MalotReleased on Project Gutenberg: April 1, 2003
- Considerations on Representative GovernmentAuthor: John Stuart MillReleased on Project Gutenberg: May 1, 2004
- Consolations in Travel; or, the Last Days of a PhilosopherAuthor: Davy, Humphry, Sir, Henry MorleyReleased on Project Gutenberg: February 28, 2006
- Conspiracy of Catiline and the Jurgurthine WarAuthor: Sallust, 87 BCE-35 BCE, J. S. (John Selby) WatsonReleased on Project Gutenberg: April 1, 2005
- Constance DunlapAuthor: Arthur B. (Arthur Benjamin) ReeveReleased on Project Gutenberg: March 1, 2004
- Constructive ImperialismAuthor: Milner, Alfred Milner, ViscountReleased on Project Gutenberg: April 22, 2005
- Consumers' Cooperative Societies in New York StateAuthor: Consumers' League of New York CityReleased on Project Gutenberg: January 1, 2004
- Contemporary American Composers: Being a Study of the Music of This Country, Its Present: Conditions and Its Future, with Critical Estimates and: Biographies of the Principal Living Composers; and an: Abundance of Portraits, Fac-simile Musical Autographs, and: CompositionsAuthor: Rupert HughesReleased on Project Gutenberg: December 10, 2007
- Contemporary American Literature: Bibliographies and Study OutlinesAuthor: John Matthews Manly, Edith RickertReleased on Project Gutenberg: June 19, 2006
- Contemporary American Novelists (1900-1920)Author: Carl Van DorenReleased on Project Gutenberg: June 1, 2004
- Contes et légendes. 1re PartieAuthor: H. A. (Hélène Adeline) GuerberReleased on Project Gutenberg: July 19, 2006
- Contigo Pan y CebollaAuthor: Manuel Eduardo de Gorostiza, Elizabeth McGuireReleased on Project Gutenberg: May 1, 2004
- Continental Monthly , Vol. 5, No. 6, June, 1864: Devoted to Literature and National PolicyAuthor: VariousReleased on Project Gutenberg: January 15, 2007
- Continental Monthly , Vol. 6, No. 1, July, 1864: Devoted to Literature and National Policy.Author: VariousReleased on Project Gutenberg: January 29, 2007
- Contrary MaryAuthor: Temple Bailey, C. S. (Charles Schell) CorsonReleased on Project Gutenberg: March 6, 2006
- Contribution to Passamaquoddy Folk-LoreAuthor: Jesse Walter FewkesReleased on Project Gutenberg: March 15, 2006
- Contributions to All The Year RoundAuthor: Charles DickensReleased on Project Gutenberg: September 1, 1998
- Contributions to the Theory of Natural Selection: A Series of EssaysAuthor: Alfred Russel WallaceReleased on Project Gutenberg: August 29, 2007
- Control GroupAuthor: Roger D. AycockReleased on Project Gutenberg: March 29, 2008
- Conversion of a High Priest into a Christian WorkerAuthor: Golden, M. (Meletios)Released on Project Gutenberg: January 6, 2008
- Copper Streak TrailAuthor: Eugene Manlove RhodesReleased on Project Gutenberg: December 31, 2004
- Copyright BasicsAuthor: Library of Congress. Copyright OfficeReleased on Project Gutenberg: July 1, 2003
- Copyright Law of the United States of America: Contained in Title 17 of the United States CodeAuthor: Library of Congress. Copyright Office, United StatesReleased on Project Gutenberg: April 1, 1995
- Copyright Law of the United States of America and Related Laws Contained in Title 17 of the United States Code, Circular 92Author: United States, Library of Congress. Copyright OfficeReleased on Project Gutenberg: July 1, 2003
- Copyright Renewals 1953Author: Library of Congress. Copyright OfficeReleased on Project Gutenberg: August 1, 2004
- Copyright Renewals 1954Author: Library of Congress. Copyright OfficeReleased on Project Gutenberg: August 1, 2004
- Copyright Renewals 1957Author: Library of Congress. Copyright OfficeReleased on Project Gutenberg: July 1, 2004
- Copyright Renewals 1959Author: Library of Congress. Copyright OfficeReleased on Project Gutenberg: September 1, 2004
- Coral and Coral ReefsAuthor: Thomas Henry HuxleyReleased on Project Gutenberg: November 1, 2001
- Coral ReefsAuthor: Charles DarwinReleased on Project Gutenberg: June 1, 2001
- Coral Reefs; Volcanic Islands; South American Geology — CompleteAuthor: Charles DarwinReleased on Project Gutenberg: May 1, 2003
- Coralie: Everyday Life Library No. 2Author: Charlotte M. BrameReleased on Project Gutenberg: August 12, 2004
- Cord and CreeseAuthor: James De MilleReleased on Project Gutenberg: July 1, 2005
- Corea or Cho-sen: The Land of the Morning CalmAuthor: Arnold Henry Savage LandorReleased on Project Gutenberg: August 7, 2004
- Corinne; Or, Italy. Volume 1 (of 2)Author: Madame de (Anne-Louise-Germaine) Staël, George Saintsbury, Greig, R. S. [Illustrator]Released on Project Gutenberg: October 17, 2005
- CoriolanusAuthor: William ShakespeareReleased on Project Gutenberg: December 1, 1997
- CoriolanusAuthor: William ShakespeareReleased on Project Gutenberg: November 1, 1998
- CoriolanusAuthor: William ShakespeareReleased on Project Gutenberg: June 1, 1999
- CoriolanusAuthor: William ShakespeareReleased on Project Gutenberg: July 1, 2000
- Cormorant Crag: A Tale of the Smuggling DaysAuthor: George Manville Fenn, W. (William) RaineyReleased on Project Gutenberg: May 4, 2007
- Cornelius O'Dowd Upon Men And Women And Other Things In GeneralAuthor: Charles LeverReleased on Project Gutenberg: May 20, 2008
- CornelliAuthor: Johanna SpyriReleased on Project Gutenberg: August 1, 2004
- Corporal Cameron of the North West Mounted Police: A Tale of the Macleod TrailAuthor: Ralph ConnorReleased on Project Gutenberg: May 30, 2006
- Corporal Sam and Other StoriesAuthor: Arthur Quiller-CouchReleased on Project Gutenberg: July 3, 2005
- Corpus of a Siam MosquitoAuthor: Sills, Steven David JustinReleased on Project Gutenberg: February 1, 2004
- Correggio: A Collection of Fifteen Pictures and a Portrait of the Painter with Introduction and InterpretationAuthor: Estelle M. (Estelle May) Hurll, CorreggioReleased on Project Gutenberg: August 29, 2006
- Correspondence & Conversations of Alexis de Tocqueville with Nassau William Senior from 1834 to 1859, Volume 2Author: Alexis de Tocqueville, Nassau William Senior, Simpson, M. C. M. (Mary Charlotte Mair) [Editor]Released on Project Gutenberg: August 30, 2004
- Correspondence of Wagner and Liszt — Volume 1Author: Richard Wagner, Franz Liszt, Francis HuefferReleased on Project Gutenberg: March 1, 2003