- Indian Frontier Policy; an historical sketchAuthor: Adye, John, SirReleased on Project Gutenberg: December 1, 2004
- Indian Games : an historical researchAuthor: Andrew McFarland DavisReleased on Project Gutenberg: November 1, 2004
- Indian Games and Dances with Native SongsAuthor: Alice C. (Alice Cunningham) FletcherReleased on Project Gutenberg: July 26, 2004
- Indian Ghost Stories: Second EditionAuthor: Mukerji, S.Released on Project Gutenberg: November 20, 2005
- Indian Heroes and Great ChieftainsAuthor: Charles A. EastmanReleased on Project Gutenberg: July 5, 2008
- Indian Legends and Other PoemsAuthor: Mary Gardiner HorsfordReleased on Project Gutenberg: August 21, 2006
- Indian Legends of MinnesotaAuthor: Severance, Cordenio A., Mrs.Released on Project Gutenberg: June 14, 2008
- Indian Legends of Vancouver IslandAuthor: Alfred Carmichael, Semeyn, J., -Released on Project Gutenberg: December 1, 2005
- Indian Linguistic Families of America, North of Mexico: Seventh Annual Report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution, 1885-1886, Government Printing Office, Washington, 1891, pages 1-142Author: John Wesley PowellReleased on Project Gutenberg: December 12, 2005
- Indian Nullification of the Unconstitutional Laws of Massachusetts Relative to the Marshpee Tribe: Or, the Pretended Riot ExplainedAuthor: William ApessReleased on Project Gutenberg: June 1, 2004
- Indian Poetry: Containing "The Indian Song of Songs," from the Sanskrit of the Gîta Govinda of Jayadeva, Two books from "The Iliad Of India" (Mahábhárata), "Proverbial Wisdom" from the Shlokas of the Hitopadesa, and other Oriental Poems.Author: Arnold, Edwin, SirReleased on Project Gutenberg: July 4, 2008
- Indian speeches (1907-1909)Author: John MorleyReleased on Project Gutenberg: February 1, 2004
- Indian Story and Song, from North AmericaAuthor: Alice C. (Alice Cunningham) FletcherReleased on Project Gutenberg: April 23, 2008
- Indian SummerAuthor: William Dean HowellsReleased on Project Gutenberg: January 1, 2005
- Indian TalesAuthor: Rudyard KiplingReleased on Project Gutenberg: August 1, 2005
- Indian UnrestAuthor: Chirol, Valentine, SirReleased on Project Gutenberg: August 5, 2005
- Indian Why Stories: Sparks from War Eagle's Lodge-FireAuthor: Frank Bird LindermanReleased on Project Gutenberg: July 1, 1996
- Indians of the Yosemite valley and vicinity: Their history, customs and traditionsAuthor: Galen ClarkReleased on Project Gutenberg: August 21, 2005
- IndirectionAuthor: Everett B. Cole, Kelly FreasReleased on Project Gutenberg: November 5, 2007
- Indiscreet Letters From Peking: Being the Notes of an Eye-Witness, Which Set Forth in Some Detail, from Day to Day, the Real Story of the Siege and Sack of a Distressed Capital in 1900—The Year of Great TribulationAuthor: B. L. (Bertram Lenox) Putnam WealeReleased on Project Gutenberg: November 4, 2005
- Indiscretions of ArchieAuthor: P. G. (Pelham Grenville) WodehouseReleased on Project Gutenberg: June 25, 2008
- Industrial Biography: Iron Workers and Tool MakersAuthor: Samuel SmilesReleased on Project Gutenberg: January 1, 1996
- Industrial Progress and Human EconomicsAuthor: James HartnessReleased on Project Gutenberg: February 1, 2004
- Inebriety and The CandidateAuthor: George CrabbeReleased on Project Gutenberg: February 1, 2004
- Inez: A Tale of the AlamoAuthor: Augusta J. (Augusta Jane) EvansReleased on Project Gutenberg: March 26, 2005
- Infant's Cabinet of Birds & BeastsAuthor: AnonymousReleased on Project Gutenberg: November 7, 2007
- Infantry Drill Regulations, United States Army, 1911: Corrected to April 15, 1917 (Changes Nos. 1 to 19)Author: United States. War DepartmentReleased on Project Gutenberg: March 20, 2007
- InfeliceAuthor: Augusta J. (Augusta Jane) EvansReleased on Project Gutenberg: February 8, 2006
- Inferences from Haunted Houses and Haunted MenAuthor: J. W. (John William) HarrisReleased on Project Gutenberg: November 3, 2004
- Influences of Geographic Environment: On the Basis of Ratzel's System of Anthropo-GeographyAuthor: Ellen Churchill SempleReleased on Project Gutenberg: March 8, 2005
- Initial Studies in American LettersAuthor: Henry A. (Henry Augustin) BeersReleased on Project Gutenberg: May 18, 2005
- Initials OnlyAuthor: Anna Katharine GreenReleased on Project Gutenberg: August 1, 1999
- Initiation into LiteratureAuthor: Émile Faguet, Home GordonReleased on Project Gutenberg: July 1, 2005
- Initiation into PhilosophyAuthor: Émile Faguet, Home GordonReleased on Project Gutenberg: November 1, 2005
- Initiative Psychic Energy: Being the Sixth of a Series of Twelve Volumes on the: Applications of Psychology to the Problems of Personal and: Business EfficiencyAuthor: Warren HiltonReleased on Project Gutenberg: December 17, 2005
- Innocent : her fancy and his factAuthor: Marie CorelliReleased on Project Gutenberg: February 1, 2004
- Inns and Taverns of Old LondonAuthor: Shelley, Henry C. (Henry Charles)Released on Project Gutenberg: October 1, 2004
- Inquiries and OpinionsAuthor: Brander MatthewsReleased on Project Gutenberg: September 25, 2005
- Inquiries into human faculty and its developmentAuthor: Francis GaltonReleased on Project Gutenberg: March 1, 2004
- Insectivorous PlantsAuthor: Charles DarwinReleased on Project Gutenberg: May 1, 2004
- Insights and Heresies Pertaining to the Evolution of the SoulAuthor: AmmyeetisReleased on Project Gutenberg: May 8, 2006
- InstinctAuthor: George O. (George Oliver) Smith, Martinez [Illustrator]Released on Project Gutenberg: December 20, 2007
- Instruction for Using a Slide RuleAuthor: Stanley, W.Released on Project Gutenberg: December 29, 2006
- Instructions on Modern American Bridge BuildingAuthor: G. B. N. (George Bates Nichols) TowerReleased on Project Gutenberg: February 2, 2005
- Integration of the Armed Forces, 1940-1965Author: Morris J. MacGregorReleased on Project Gutenberg: February 15, 2007
- IntentionsAuthor: Oscar WildeReleased on Project Gutenberg: April 1, 1997
- Interludes: being Two Essays, a Story, and Some VersesAuthor: Horace SmithReleased on Project Gutenberg: November 14, 2005
- International Conference Held at Washington for the Purpose of Fixing a Prime Meridian and a Universal Day. October, 1884.: Protocols of the ProceedingsAuthor: International Meridian Conference (Released on Project Gutenberg: February 12, 2006
- International copyrightAuthor: George Haven PutnamReleased on Project Gutenberg: September 16, 2007
- International FinanceAuthor: Hartley WithersReleased on Project Gutenberg: April 1, 2004
- International Language, Past, Present & Future: With Specimens of Esperanto and GrammarAuthor: Clark, Walter JohnReleased on Project Gutenberg: September 24, 2005
- International Miscellany of Literature, Art and Science, Vol. 1,: No. 3, Oct. 1, 1850Author: VariousReleased on Project Gutenberg: December 23, 2004
- International Short Stories: FrenchAuthor: Francis J. (Francis Joseph) Reynolds, Jean Aicard, Honoré de Balzac, René Bazin, Paul BourgetReleased on Project Gutenberg: January 1, 2004
- International Weekly Miscellany of Literature, Art and Science - Volume 1, No. 5, July 29, 1850Author: VariousReleased on Project Gutenberg: August 21, 2004
- International Weekly Miscellany of Literature, Art and Science - Volume 1, No. 6, August 5, 1850Author: VariousReleased on Project Gutenberg: October 6, 2004
- International Weekly Miscellany of Literature, Art and Science - Volume 1, No. 7, August 12, 1850Author: VariousReleased on Project Gutenberg: October 11, 2004
- International Weekly Miscellany of Literature, Art and Science - Volume 1, No. 8, August 19, 1850Author: VariousReleased on Project Gutenberg: October 19, 2004
- International Weekly Miscellany of Literature, Art and Science - Volume 1, No. 9, August 26, 1850Author: VariousReleased on Project Gutenberg: October 19, 2004
- International Weekly Miscellany of Literature, Art and Science — Volume 1, No. 2, July 8, 1850Author: VariousReleased on Project Gutenberg: July 21, 2004
- International Weekly Miscellany of Literature, Art and Science — Volume 1, No. 3, July 15, 1850Author: VariousReleased on Project Gutenberg: July 22, 2004