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- Letters of Anton Chekhov to His Family and FriendsAuthor: Anton Pavlovich Chekhov, Constance GarnettReleased on Project Gutenberg: September 1, 2004
- Letters of Catherine BenincasaAuthor: Catherine, of Siena, Saint, Vida Dutton ScudderReleased on Project Gutenberg: February 1, 2005
- Letters of Edward FitzGerald to Fanny Kemble (1871-1883)Author: Edward FitzGerald, William Aldis WrightReleased on Project Gutenberg: May 14, 2007
- Letters of Edward FitzGerald, in Two Volumes. Vol. 1Author: Edward FitzGerald, William Aldis WrightReleased on Project Gutenberg: January 27, 2007
- Letters of Edward FitzGerald, in Two Volumes. Vol. 2Author: Edward FitzGerald, William Aldis WrightReleased on Project Gutenberg: February 6, 2007
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- Letters of Franz Liszt -- Volume 2: from Rome to the EndAuthor: Franz Liszt, La Mara, Constance BacheReleased on Project Gutenberg: February 1, 2003
- Letters of George Borrow to the British and Foreign Bible SocietyAuthor: George Borrow, T. H. (Thomas Herbert) DarlowReleased on Project Gutenberg: July 1, 1996
- Letters of Horace Walpole — Volume IAuthor: Horace Walpole, Charles Duke YongeReleased on Project Gutenberg: April 1, 2004
- Letters of Horace Walpole — Volume IIAuthor: Horace Walpole, Charles Duke YongeReleased on Project Gutenberg: April 1, 2004
- Letters of Lt.-Col. George Brenton Laurie: (commanding 1st Battn. Royal Irish Rifles) Dated November 4th, 1914-March 11th, 1915Author: G. B. (George Brenton) Laurie, Vere-Laurie, Florence [Editor]Released on Project Gutenberg: March 17, 2008
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- Letters of Two BridesAuthor: Honoré de Balzac, Scott, R. S. [Translator]Released on Project Gutenberg: October 1, 1999
- Letters of Ulysses S. Grant to his father and his youngest sister, 1857-78Author: Ulysses S. (Ulysses Simpson) Grant, Jesse Grant CramerReleased on Project Gutenberg: September 15, 2004
- Letters on Demonology and WitchcraftAuthor: Walter Scott, Henry MorleyReleased on Project Gutenberg: December 25, 2004
- Letters on EnglandAuthor: Voltaire, Henry MorleyReleased on Project Gutenberg: December 1, 2000
- Letters on International Copyright; Second EditionAuthor: Henry Charles CareyReleased on Project Gutenberg: December 7, 2004
- Letters on LiteratureAuthor: Andrew LangReleased on Project Gutenberg: July 1, 1998
- Letters to "The Times" upon War and Neutrality (1881-1920)Author: Thomas Erskine HollandReleased on Project Gutenberg: December 24, 2004
- Letters to a Daughter and A Little Sermon to School GirlsAuthor: Helen Ekin StarrettReleased on Project Gutenberg: March 20, 2005
- Letters to Dead AuthorsAuthor: Andrew LangReleased on Project Gutenberg: October 1, 1998
- Letters to Dead AuthorsAuthor: Andrew LangReleased on Project Gutenberg: July 1, 2002
- Letters to Helen: Impressions of an Artist on the Western FrontAuthor: Keith HendersonReleased on Project Gutenberg: August 31, 2005
- Letters to His ChildrenAuthor: Theodore Roosevelt, Joseph Bucklin BishopReleased on Project Gutenberg: April 22, 2006
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- Letters to His Son, 1746-47: On the Fine Art of Becoming a Man of the World and a GentlemanAuthor: Chesterfield, Philip Dormer Stanhope, Earl ofReleased on Project Gutenberg: December 1, 2004
- Letters to His Son, 1748: On the Fine Art of Becoming a Man of the World and a GentlemanAuthor: Chesterfield, Philip Dormer Stanhope, Earl ofReleased on Project Gutenberg: December 1, 2004
- Letters to His Son, 1749: On the Fine Art of Becoming a Man of the World and a GentlemanAuthor: Chesterfield, Philip Dormer Stanhope, Earl ofReleased on Project Gutenberg: December 1, 2004
- Letters to His Son, 1750: On the Fine Art of Becoming a Man of the World and a GentlemanAuthor: Chesterfield, Philip Dormer Stanhope, Earl ofReleased on Project Gutenberg: December 1, 2004
- Letters to His Son, 1751: On the Fine Art of Becoming a Man of the World and a GentlemanAuthor: Chesterfield, Philip Dormer Stanhope, Earl ofReleased on Project Gutenberg: August 1, 2002
- Letters to His Son, 1752: On the Fine Art of Becoming a Man of the World and a GentlemanAuthor: Chesterfield, Philip Dormer Stanhope, Earl ofReleased on Project Gutenberg: December 1, 2004
- Letters to His Son, 1753-54: On the Fine Art of Becoming a Man of the World and a GentlemanAuthor: Chesterfield, Philip Dormer Stanhope, Earl ofReleased on Project Gutenberg: December 1, 2004
- Letters to His Son, 1756-58: On the Fine Art of Becoming a Man of the World and a GentlemanAuthor: Chesterfield, Philip Dormer Stanhope, Earl ofReleased on Project Gutenberg: December 1, 2004
- Letters to His Son, 1759-65: On the Fine Art of Becoming a Man of the World and a GentlemanAuthor: Chesterfield, Philip Dormer Stanhope, Earl ofReleased on Project Gutenberg: December 1, 2004
- Letters to His Son, 1766-71: On the Fine Art of Becoming a Man of the World and a GentlemanAuthor: Chesterfield, Philip Dormer Stanhope, Earl ofReleased on Project Gutenberg: December 1, 2004
- Letters to His Son, Complete: On the Fine Art of Becoming a Man of the World and a GentlemanAuthor: Chesterfield, Philip Dormer Stanhope, Earl ofReleased on Project Gutenberg: October 12, 2004
- Letters to Sir William Windham and Mr. PopeAuthor: Bolingbroke, Henry St. John, Viscount, Henry MorleyReleased on Project Gutenberg: February 1, 2004
- Letters Written During a Short Residence in Sweden, Norway, and DenmarkAuthor: Mary WollstonecraftReleased on Project Gutenberg: November 1, 2002
- Levels of Living: Essays on Everyday IdealsAuthor: Henry Frederick CopeReleased on Project Gutenberg: June 29, 2006
- LeviathanAuthor: Thomas HobbesReleased on Project Gutenberg: May 1, 2002
- Lewie; Or, The Bended TwigAuthor: Sarah H. (Sarah Hopkins) BradfordReleased on Project Gutenberg: March 3, 2005
- Lewis RandAuthor: Mary Johnston, F. C. (Frederick Coffay) YohnReleased on Project Gutenberg: January 15, 2005
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- Liber Amoris, Or, The New PygmalionAuthor: William HazlittReleased on Project Gutenberg: January 1, 2000
- Liberalism and the Social ProblemAuthor: Winston ChurchillReleased on Project Gutenberg: May 18, 2006
- Libraries in the Medieval and Renaissance Periods: The Rede Lecture Delivered June 13, 1894Author: John Willis ClarkReleased on Project Gutenberg: October 1, 2006
- Library of the World's Best Literature, Ancient and Modern — Volume 01Author: Charles Dudley Warner, Hamilton Wright Mabie, Lucia Gilbert (Lucia Isabella Gilbert) Runkle, George H. WarnerReleased on Project Gutenberg: May 1, 2004
- Library of the World's Best Literature, Ancient and Modern — Volume 02Author: Charles Dudley Warner, Hamilton Wright Mabie, Lucia Gilbert (Lucia Isabella Gilbert) Runkle, George H. WarnerReleased on Project Gutenberg: June 30, 2004
- Library of the World's Best Literature, Ancient and Modern — Volume 03Author: Charles Dudley Warner, Hamilton Wright Mabie, Lucia Gilbert (Lucia Isabella Gilbert) Runkle, George H. WarnerReleased on Project Gutenberg: July 26, 2004
- Library of the World's Best Literature, Ancient and Modern — Volume 04Author: Charles Dudley Warner, Hamilton Wright Mabie, Lucia Gilbert (Lucia Isabella Gilbert) Runkle, George H. WarnerReleased on Project Gutenberg: August 19, 2004