- The Curlytops at Uncle Frank's Ranch; Or, Little Folks on PonybackAuthor: Howard Roger GarisReleased on Project Gutenberg: November 1, 2004
- The Curlytops on Star Island; Or, Camping out with GrandpaAuthor: Howard Roger GarisReleased on Project Gutenberg: June 1, 2004
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- The Damned Thing: 1898, From "In the Midst of Life"Author: Ambrose BierceReleased on Project Gutenberg: October 24, 2007
- The Damsel and the Sage: A Woman's WhimsiesAuthor: Elinor GlynReleased on Project Gutenberg: March 1, 2007
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- The Danish History, Books I-IXAuthor: Saxo, Grammaticus, -, Oliver EltonReleased on Project Gutenberg: February 11, 2006
- The Danvers Jewels, and Sir Charles DanversAuthor: Mary CholmondeleyReleased on Project Gutenberg: August 10, 2006
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- The Dark ForestAuthor: Hugh WalpoleReleased on Project Gutenberg: October 24, 2006
- The Dark HouseAuthor: I. A. R. (Ida Alexa Ross) WylieReleased on Project Gutenberg: September 27, 2004
- The Dark House: A Knot UnravelledAuthor: George Manville FennReleased on Project Gutenberg: May 29, 2008
- The Dark Lady of the SonnetsAuthor: Bernard ShawReleased on Project Gutenberg: September 1, 1997
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- The Darling and Other StoriesAuthor: Anton Pavlovich Chekhov, Constance GarnettReleased on Project Gutenberg: September 9, 2004
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- The Dawn of Amateur Radio in the U.K. and Greece: A Personal ViewAuthor: Joly, Norman F.Released on Project Gutenberg: May 1, 1993
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- The Day of Days: An ExtravaganzaAuthor: Louis Joseph Vance, Arthur William BrownReleased on Project Gutenberg: May 20, 2005
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- The Day's Work - Part 1Author: Rudyard KiplingReleased on Project Gutenberg: April 1, 2000