- The Inside of the Cup — Volume 05Author: Winston ChurchillReleased on Project Gutenberg: October 17, 2004
- The Inside of the Cup — Volume 06Author: Winston ChurchillReleased on Project Gutenberg: October 17, 2004
- The Inside of the Cup — Volume 07Author: Winston ChurchillReleased on Project Gutenberg: October 17, 2004
- The Inside of the Cup — Volume 08Author: Winston ChurchillReleased on Project Gutenberg: October 17, 2004
- The Inside Story of the Peace ConferenceAuthor: Emile Joseph DillonReleased on Project Gutenberg: December 26, 2004
- The Insidious Dr. Fu ManchuAuthor: Sax RohmerReleased on Project Gutenberg: October 1, 1994
- The Inspector-GeneralAuthor: Nikolai Vasilevich Gogol, Seltzer, ThomasReleased on Project Gutenberg: February 1, 2003
- The Institutes of JustinianAuthor: John Baron MoyleReleased on Project Gutenberg: June 1, 2004
- The Insurrection in DublinAuthor: James StephensReleased on Project Gutenberg: July 9, 2004
- The Insurrection in ParisAuthor: Davy (An Englishman)Released on Project Gutenberg: November 24, 2006
- The Intellectual Development of the Canadian People: An Historical ReviewAuthor: John George BourinotReleased on Project Gutenberg: September 1, 2004
- The Intelligence Office (From "Mosses from an Old Manse")Author: Nathaniel HawthorneReleased on Project Gutenberg: November 1, 2005
- The Interdependence of LiteratureAuthor: Georgina Pell CurtisReleased on Project Gutenberg: February 1, 2003
- The Interest of America in Sea Power, Present and FutureAuthor: A. T. (Alfred Thayer) MahanReleased on Project Gutenberg: May 2, 2005
- The Interesting Narrative of the Life of Olaudah Equiano, Or Gustavus Vassa, The African: Written By HimselfAuthor: Olaudah EquianoReleased on Project Gutenberg: March 17, 2005
- The Interlude of Wealth and HealthAuthor: Anonymous, Percy SimpsonReleased on Project Gutenberg: December 9, 2005
- The International Jewish Cook Book: 1600 Recipes According to the Jewish Dietary Laws with the Rules for Kashering;: the Favorite Recipes of America, Austria, Germany, Russia, France, Poland, Roumania, Etc., Etc.Author: Greenbaum, Florence KreislerReleased on Project Gutenberg: May 1, 2004
- The International Magazine, Volume 2, No. 2, January, 1851Author: VariousReleased on Project Gutenberg: September 21, 2007
- The International Monthly Magazine - Volume V - No IIAuthor: VariousReleased on Project Gutenberg: December 13, 2006
- The International Monthly Magazine, Volume 1, No. 1, August 1850: of Literature, Science and Art.Author: VariousReleased on Project Gutenberg: May 19, 2007
- The International Monthly Magazine, Volume 5, No. 1, January, 1852Author: VariousReleased on Project Gutenberg: March 31, 2007
- The International Monthly, Volume 2, No. 4, March, 1851Author: VariousReleased on Project Gutenberg: March 23, 2008
- The International Monthly, Volume 3, No. 1, April, 1851Author: VariousReleased on Project Gutenberg: May 4, 2008
- The Interpreters of Genesis and the Interpreters of Nature: Essay #4 from "Science and Hebrew Tradition"Author: Thomas Henry HuxleyReleased on Project Gutenberg: May 1, 2001
- The IntriguersAuthor: Harold BindlossReleased on Project Gutenberg: December 21, 2004
- The Intrusion of JimmyAuthor: P. G. (Pelham Grenville) WodehouseReleased on Project Gutenberg: May 1, 2003
- The InvadersAuthor: Ferris, Benjamin, Vincent NapoliReleased on Project Gutenberg: November 18, 2007
- The Invention of a New ReligionAuthor: Basil Hall ChamberlainReleased on Project Gutenberg: February 1, 2001
- The Investment of Influence: A Study of Social Sympathy and ServiceAuthor: Newell Dwight HillisReleased on Project Gutenberg: December 10, 2005
- The Invisible GovernmentAuthor: Dan SmootReleased on Project Gutenberg: December 30, 2006
- The Invisible Man: A Grotesque RomanceAuthor: H. G. (Herbert George) WellsReleased on Project Gutenberg: March 1, 2004
- The Iphigenia in Tauris of EuripidesAuthor: Euripides, Gilbert MurrayReleased on Project Gutenberg: February 1, 2004
- The Iraq Study Group ReportAuthor: Iraq Study Group (U.S.)Released on Project Gutenberg: June 3, 2008
- The Irish Race in the Past and the PresentAuthor: Augustus J. ThébaudReleased on Project Gutenberg: March 1, 2002
- The Iron FurrowAuthor: George C. (George Clifford) Shedd, Henry Albert BotkinReleased on Project Gutenberg: November 18, 2005
- The Iron Game: A Tale of the WarAuthor: Henry F. (Henry Francis) KeenanReleased on Project Gutenberg: November 1, 2003
- The iron heelAuthor: Jack LondonReleased on Project Gutenberg: May 3, 2006
- The Iron HorseAuthor: R. M. (Robert Michael) BallantyneReleased on Project Gutenberg: June 7, 2007
- The Iron Puddler: My Life in the Rolling Mills and What Came of ItAuthor: James J. (James John) DavisReleased on Project Gutenberg: May 1, 1998
- The Iron Rule; Or, Tyranny in the HouseholdAuthor: T. S. (Timothy Shay) ArthurReleased on Project Gutenberg: November 1, 2003
- The Iron Star — And What It Saw on Its Journey Through the Ages: From Myth to HistoryAuthor: John Preston TrueReleased on Project Gutenberg: July 1, 2004
- The Iron TrailAuthor: Rex BeachReleased on Project Gutenberg: March 1, 2004
- The Iron WomanAuthor: Margaret Wade Campbell DelandReleased on Project Gutenberg: September 1, 2004
- The Iroquois Book of RitesAuthor: Horatio HaleReleased on Project Gutenberg: July 1, 2005
- The Irrational Knot: Being the Second Novel of His NonageAuthor: Bernard ShawReleased on Project Gutenberg: February 1, 2004
- The Island HomeAuthor: Archer, Richard, -, Edward Dalziel, George DalzielReleased on Project Gutenberg: October 20, 2007
- The island of Doctor MoreauAuthor: H. G. (Herbert George) WellsReleased on Project Gutenberg: October 14, 2004
- The Island of FaithAuthor: Margaret E. (Margaret Elizabeth) SangsterReleased on Project Gutenberg: August 25, 2004
- The Island PhariseesAuthor: John GalsworthyReleased on Project Gutenberg: June 14, 2006
- The Island QueenAuthor: R. M. (Robert Michael) BallantyneReleased on Project Gutenberg: June 7, 2007
- The Island TreasureAuthor: Hutcheson, John C. (John Conroy), W. S. (Walter S.) StaceyReleased on Project Gutenberg: October 21, 2007
- The Isle Of Pines (1668): and An Essay in Bibliography by Worthington Chauncey FordAuthor: Henry Neville, Worthington Chauncey FordReleased on Project Gutenberg: May 9, 2007
- The Isle of UnrestAuthor: Henry Seton MerrimanReleased on Project Gutenberg: September 1, 2005
- The Isles of SunsetAuthor: Arthur Christopher BensonReleased on Project Gutenberg: July 21, 2006
- The Italian Cook Book: The Art of Eating Well; Practical Recipes of the Italian Cuisine, Pastries, Sweets, Frozen Delicacies, and SyrupsAuthor: Gentile, MariaReleased on Project Gutenberg: January 24, 2008
- The Italians: A NovelAuthor: Frances Minto Dickinson ElliotReleased on Project Gutenberg: May 1, 2004
- The Itinerary of Archbishop Baldwin Through WalesAuthor: Giraldus, CambrensisReleased on Project Gutenberg: December 1, 1997
- The Itinerary of Benjamin of TudelaAuthor: Benjamin, of Tudela, active 12th century, Marcus Nathan AdlerReleased on Project Gutenberg: February 8, 2005
- The Ivory ChildAuthor: H. Rider (Henry Rider) HaggardReleased on Project Gutenberg: March 31, 2006
- The Ivory TrailAuthor: Talbot MundyReleased on Project Gutenberg: February 1, 2004