- Speeches on Questions of Public Policy, Volume 1Author: John Bright, James E. Thorold (James Edwin Thorold) RogersReleased on Project Gutenberg: December 1, 2004
- Speeches: Literary and SocialAuthor: Charles DickensReleased on Project Gutenberg: February 1, 1997
- Speed the ploughAuthor: Thomas MortonReleased on Project Gutenberg: September 29, 2006
- Spenser's The Faerie Queene, Book IAuthor: Spenser, Edmund, George Armstrong WauchopeReleased on Project Gutenberg: March 7, 2005
- Spherical Trigonometry: For the Use of Colleges and SchoolsAuthor: I. (Isaac) TodhunterReleased on Project Gutenberg: November 12, 2006
- Spinifex and Sand: A Narrative of Five Years' Pioneering and Exploration in Western AusraliaAuthor: David Wynford CarnegieReleased on Project Gutenberg: January 1, 2004
- Spirit and MusicAuthor: Hunt, H. Ernest (Harry Ernest)Released on Project Gutenberg: May 20, 2007
- Spirits in Bondage: A Cycle of LyricsAuthor: C. S. (Clive Staples) LewisReleased on Project Gutenberg: December 1, 1999
- Spiritual Life and the Word of GodAuthor: Emanuel SwedenborgReleased on Project Gutenberg: November 11, 2004
- Spiritual Reformers in the 16th & 17th CenturiesAuthor: Rufus M. (Rufus Matthew) JonesReleased on Project Gutenberg: March 28, 2008
- Spiritual TorrentsAuthor: Jeanne Marie Bouvier de la Motte GuyonReleased on Project Gutenberg: April 22, 2008
- Spontaneous Activity in EducationAuthor: Maria MontessoriReleased on Project Gutenberg: March 2, 2008
- Spool KnittingAuthor: McCormack, Mary A.Released on Project Gutenberg: July 9, 2007
- Spoon River AnthologyAuthor: Edgar Lee MastersReleased on Project Gutenberg: April 1, 1998
- Sport and Work on the Nepaul Frontier: Twelve Years Sporting Reminiscences of an Indigo PlanterAuthor: James InglisReleased on Project Gutenberg: January 1, 2004
- Spring BlossomsAuthor: AnonymousReleased on Project Gutenberg: November 4, 2007
- Spring DaysAuthor: George MooreReleased on Project Gutenberg: July 1, 2004
- Spring Street: A Story of Los AngelesAuthor: James Hugh RichardsonReleased on Project Gutenberg: August 1, 2007
- Springhaven: A Tale of the Great WarAuthor: R. D. (Richard Doddridge) BlackmoreReleased on Project Gutenberg: June 6, 2006
- Square Deal SandersonAuthor: Charles Alden Seltzer, J. Allen (James Allen) St. JohnReleased on Project Gutenberg: August 25, 2005
- Squash TennisAuthor: Squires, Richard C.Released on Project Gutenberg: March 1, 2004
- Squinty the Comical Pig: His Many AdventuresAuthor: Barnum, Richard, Tooker, Harriet H. [Illustrator]Released on Project Gutenberg: February 1, 2004
- Squirrels and Other Fur-BearersAuthor: John BurroughsReleased on Project Gutenberg: January 21, 2008
- St. Bernard of Clairvaux's Life of St. Malachy of ArmaghAuthor: Bernard, of Clairvaux, Saint, Hugh Jackson LawlorReleased on Project Gutenberg: June 11, 2008
- St. Cuthbert'sAuthor: Robert E. (Robert Edward) KnowlesReleased on Project Gutenberg: July 6, 2007
- St. ElmoAuthor: Augusta J. (Augusta Jane) EvansReleased on Project Gutenberg: October 1, 2003
- St. George and St. MichaelAuthor: George MacDonaldReleased on Project Gutenberg: May 1, 2004
- St. George and St. Michael, Volume 1Author: George MacDonaldReleased on Project Gutenberg: May 1, 2004
- St. George and St. Michael, Volume 2Author: George MacDonaldReleased on Project Gutenberg: May 1, 2004
- St. George and St. Michael, Volume 3Author: George MacDonaldReleased on Project Gutenberg: May 1, 2004
- St. George for EnglandAuthor: G. A. (George Alfred) HentyReleased on Project Gutenberg: September 1, 2002
- St. George's Cross; Or, England Above AllAuthor: H. G. (Henry George) KeeneReleased on Project Gutenberg: November 30, 2004
- St. Ives: Being the Adventures of a French Prisoner in EnglandAuthor: Robert Louis StevensonReleased on Project Gutenberg: September 1, 1995
- St. Martin's SummerAuthor: Rafael SabatiniReleased on Project Gutenberg: May 1, 2001
- St. Nicholas Magazine for Boys and Girls, Vol. 5, January 1878, No. 3Author: Mary Mapes Dodge, VariousReleased on Project Gutenberg: September 28, 2006
- St. Nicholas Magazine for Boys and Girls, Vol. 5, July 1878, No. 9Author: Mary Mapes Dodge, VariousReleased on Project Gutenberg: June 22, 2007
- St. Nicholas Magazine for Boys and Girls, Vol. 5, No. 06, April 1878: Scribner's IllustratedAuthor: Various, Mary Mapes DodgeReleased on Project Gutenberg: December 19, 2007
- St. Nicholas Magazine for Boys and Girls, Vol. 5, No. 07, May 1878: Scribner's IllustratedAuthor: Various, Mary Mapes DodgeReleased on Project Gutenberg: July 1, 2005
- St. Nicholas Magazine for Boys and Girls, Vol. 5, No. 08, June 1878: Scribner's IllustratedAuthor: Various, Mary Mapes DodgeReleased on Project Gutenberg: June 23, 2005
- St. Nicholas Magazine for Boys and Girls, Vol. 5, Nov 1877-Nov 1878: No 1, Nov 1877Author: Mary Mapes Dodge, VariousReleased on Project Gutenberg: January 14, 2006
- St. Nicholas Magazine for Boys and Girls, Vol. 5, October 1878, No. 12Author: Mary Mapes Dodge, VariousReleased on Project Gutenberg: January 5, 2006
- St. Nicholas Magazine for Boys and Girls, Vol. 5, September 1878, No. 11Author: Mary Mapes Dodge, VariousReleased on Project Gutenberg: December 28, 2005
- St. Nicholas, Vol. 5, No. 2, December, 1877Author: VariousReleased on Project Gutenberg: March 15, 2005
- St. Nicholas, Vol. 5, No. 4, February 1878Author: VariousReleased on Project Gutenberg: March 12, 2005
- St. Nicholas, Vol. 5, No. 5, March, 1878Author: VariousReleased on Project Gutenberg: March 15, 2005
- St. Patrick's Day; Or, The Scheming Lieutenant: A Farce in One ActAuthor: Richard Brinsley SheridanReleased on Project Gutenberg: October 1, 2004
- St. Ronan's WellAuthor: Walter ScottReleased on Project Gutenberg: March 6, 2007
- St. Winifred's; or, The World of SchoolAuthor: F. W. (Frederic William) Farrar, H. C. (Harold C.) EarnshawReleased on Project Gutenberg: January 16, 2008
- Staccato Notes of a Vanished Summer (from Literature and Life)Author: William Dean HowellsReleased on Project Gutenberg: October 22, 2004
- Stage Confidences: Talks About Players and Play ActingAuthor: Clara MorrisReleased on Project Gutenberg: August 25, 2004
- Stage-LandAuthor: Jerome K. (Jerome Klapka) JeromeReleased on Project Gutenberg: March 1, 1997
- Stairway to the StarsAuthor: Larry T. ShawReleased on Project Gutenberg: October 24, 2007
- Stalky & Co.Author: Rudyard KiplingReleased on Project Gutenberg: January 1, 2002
- Stammering, its cause and cureAuthor: Benjamin Nathaniel BogueReleased on Project Gutenberg: July 1, 2003
- Stamp Collecting as a PastimeAuthor: Edward J. (Edward James) NankivellReleased on Project Gutenberg: April 18, 2006
- Stand by for Mars!Author: Rockwell, Carey, Willy Ley, Glanzman, Louis [Illustrator]Released on Project Gutenberg: October 11, 2006
- Stand By The UnionAuthor: Oliver Optic, L. J. (Lewis Jesse) BridgmanReleased on Project Gutenberg: July 13, 2006
- Stand By! Naval Sketches and StoriesAuthor: H. Taprell (Henry Taprell) DorlingReleased on Project Gutenberg: July 13, 2008
- Standard Selections: A Collection and Adaptation of Superior Productions from Best Authors for Use in Class Room and on the PlatformAuthor: Robert I. (Robert Irving) Fulton, Trueblood, Edwin P. [Editor], Thomas C. (Thomas Clarkson) TruebloodReleased on Project Gutenberg: November 27, 2006
- Standish of Standish: A Story of the PilgrimsAuthor: Jane G. (Jane Goodwin) AustinReleased on Project Gutenberg: July 12, 2007