- Slave Narratives: A Folk History of Slavery in the United States from Interviews with Former Slaves, Volume VI, Kansas NarrativesAuthor: United States. Work Projects AdministrationReleased on Project Gutenberg: March 1, 2004
- Slave Narratives: A Folk History of Slavery in the United States from Interviews with Former Slaves, Volume VII, Kentucky NarrativesAuthor: United States. Work Projects AdministrationReleased on Project Gutenberg: April 1, 2004
- Slave Narratives: A Folk History of Slavery in the United States from Interviews with Former Slaves, Volume VIII, Maryland NarrativesAuthor: United States. Work Projects AdministrationReleased on Project Gutenberg: March 1, 2004
- Slave Narratives: A Folk History of Slavery in the United States from Interviews with Former Slaves, Volume XI, North Carolina Narratives, Part 1Author: United States. Work Projects AdministrationReleased on Project Gutenberg: October 12, 2007
- Slave Narratives: A Folk History of Slavery in the United States from Interviews with Former Slaves, Volume XII, Ohio NarrativesAuthor: United States. Work Projects AdministrationReleased on Project Gutenberg: August 18, 2004
- Slave Narratives: A Folk History of Slavery in the United States from Interviews with Former Slaves, Volume XIII, Oklahoma NarrativesAuthor: United States. Work Projects AdministrationReleased on Project Gutenberg: March 8, 2007
- Slave Narratives: A Folk History of Slavery in the United States from Interviews with Former Slaves, Volume XIV, South Carolina Narratives, Part 1Author: United States. Work Projects AdministrationReleased on Project Gutenberg: July 26, 2006
- Slave Narratives: A Folk History of Slavery in the United States from Interviews with Former Slaves, Volume XIV, South Carolina Narratives, Part 2Author: United States. Work Projects AdministrationReleased on Project Gutenberg: May 17, 2007
- Slave Narratives: A Folk History of Slavery in the United States from Interviews with Former Slaves, Volume XV, Tennessee NarrativesAuthor: United States. Work Projects AdministrationReleased on Project Gutenberg: November 27, 2006
- Slave Narratives: A Folk History of Slavery in the United States from Interviews with Former Slaves. Administrative Files: Selected Records Bearing on the History of the Slave NarrativesAuthor: United States. Work Projects AdministrationReleased on Project Gutenberg: October 25, 2004
- Slavery and four years of warAuthor: Joseph Warren KeiferReleased on Project Gutenberg: July 19, 2007
- Slavery Ordained of GodAuthor: F. A. (Frederick Augustus) RossReleased on Project Gutenberg: October 1, 2005
- Slavery's Passed Away and Other SongsAuthor: VariousReleased on Project Gutenberg: February 16, 2006
- Sleep-bookAuthor: Leolyn Louise EverettReleased on Project Gutenberg: September 3, 2005
- Sleeping Fires: a NovelAuthor: Gertrude Franklin Horn AthertonReleased on Project Gutenberg: November 1, 2004
- SlingshotAuthor: Lande, Irving W., Ed EmshwillerReleased on Project Gutenberg: August 30, 2007
- Slippy McGee, Sometimes Known as the Butterfly ManAuthor: Marie Conway OemlerReleased on Project Gutenberg: May 17, 2005
- Slips of speechAuthor: John Hendricks BechtelReleased on Project Gutenberg: January 1, 2004
- Slovenly BetsyAuthor: Heinrich HoffmannReleased on Project Gutenberg: November 24, 2006
- Slow and Sure: The Story of Paul Hoffman the Young Street-MerchantAuthor: Alger, Horatio, Jr.Released on Project Gutenberg: April 23, 2008
- Small Means and Great EndsAuthor: M. H. (Mary Hall) AdamsReleased on Project Gutenberg: March 1, 2004
- Smaïn; and Safti's Summer Day: 1905Author: Robert HichensReleased on Project Gutenberg: November 8, 2007
- Smith and the Pharaohs, and other TalesAuthor: H. Rider (Henry Rider) HaggardReleased on Project Gutenberg: April 22, 2006
- Smoke BellewAuthor: Jack LondonReleased on Project Gutenberg: January 1, 1999
- Smoke BellewAuthor: Jack LondonReleased on Project Gutenberg: May 1, 2004
- Snake and Sword: A NovelAuthor: Percival Christopher WrenReleased on Project Gutenberg: January 1, 2004
- Snarleyyow, or, the Dog FiendAuthor: Frederick MarryatReleased on Project Gutenberg: June 1, 2004
- Snarleyyow; or, The Dog FiendAuthor: Frederick MarryatReleased on Project Gutenberg: May 22, 2007
- Snow Bound, and other poems: Part 4 From Volume II of The Works of John Greenleaf WhittierAuthor: John Greenleaf WhittierReleased on Project Gutenberg: December 1, 2005
- Snow Flakes (From "Twice Told Tales")Author: Nathaniel HawthorneReleased on Project Gutenberg: November 1, 2005
- Snow Shoes and Canoes: Or, The Early Days of a Fur-Trader in the Hudson Bay TerritoryAuthor: William Henry Giles Kingston, Little, Norman [Illustrator]Released on Project Gutenberg: May 15, 2007
- Snow-BlindAuthor: Katharine Newlin BurtReleased on Project Gutenberg: February 1, 2005
- Snow-boundAuthor: John Greenleaf Whittier, Harry FennReleased on Project Gutenberg: December 30, 2006
- Snow-Bound at Eagle'sAuthor: Bret HarteReleased on Project Gutenberg: May 14, 2006
- Snowflakes and Sunbeams; Or, The Young Fur-traders: A Tale of the Far NorthAuthor: R. M. (Robert Michael) BallantyneReleased on Project Gutenberg: August 1, 2004
- Snubby Nose and Tippy ToesAuthor: Laura Rountree SmithReleased on Project Gutenberg: November 1, 2003
- So Runs the WorldAuthor: Henryk Sienkiewicz, Count de SoissonsReleased on Project Gutenberg: December 1, 2003
- Social life at Rome in the Age of CiceroAuthor: W. Warde (William Warde) FowlerReleased on Project Gutenberg: February 1, 2004
- Social Life in the Insect WorldAuthor: Jean-Henri Fabre, Bernard MiallReleased on Project Gutenberg: May 8, 2006
- Social Pictorial SatireAuthor: George Du MaurierReleased on Project Gutenberg: July 7, 2004
- Socialism and American idealsAuthor: William Starr MyersReleased on Project Gutenberg: October 11, 2004
- Socialism and Modern Science (Darwin, Spencer, Marx)Author: Enrico Ferri, La Monte, Robert Rives [Translator]Released on Project Gutenberg: May 16, 2006
- Socialism as it isAuthor: William English WallingReleased on Project Gutenberg: March 14, 2007
- Socialism: A Summary and Interpretation of Socialist PrinciplesAuthor: John SpargoReleased on Project Gutenberg: September 23, 2007
- Socialism: Positive and NegativeAuthor: La Monte, Robert RivesReleased on Project Gutenberg: November 21, 2007
- Society's Child (lyrics)Author: Janis IanReleased on Project Gutenberg: January 1, 2002
- Society: Its Origin and DevelopmentAuthor: Henry K. (Henry Kalloch) RoweReleased on Project Gutenberg: May 25, 2007
- Sociology and Modern Social ProblemsAuthor: Charles A. (Charles Abram) EllwoodReleased on Project Gutenberg: September 1, 2004
- SocratesAuthor: Voltaire, Morlock, Frank J. [Translator]Released on Project Gutenberg: November 1, 2003
- Sodom and Gomorrah, TexasAuthor: R. A. Lafferty, Ritter, Bob [Illustrator]Released on Project Gutenberg: October 24, 2007
- Soldier silhouettes on our frontAuthor: William L. (William Le Roy) Stidger, Jessie GillespieReleased on Project Gutenberg: March 30, 2006
- Soldier Songs and Love SongsAuthor: A. H. (Alexander Hamilton) LaidlawReleased on Project Gutenberg: February 2, 2005
- Soldiers of FortuneAuthor: Richard Harding DavisReleased on Project Gutenberg: January 1, 1996
- Soldiers ThreeAuthor: Rudyard KiplingReleased on Project Gutenberg: July 1, 2004
- Soldiers Three - Part 2Author: Rudyard KiplingReleased on Project Gutenberg: June 1, 2000
- Solomon's OrbitAuthor: William Carroll, John SchoenherrReleased on Project Gutenberg: October 24, 2007
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- Some Anomalies of the Short Story (from Literature and Life)Author: William Dean HowellsReleased on Project Gutenberg: October 22, 2004
- Some Answered QuestionsAuthor: ʻAbdu'l-BaháReleased on Project Gutenberg: September 18, 2006
- Some Broken TwigsAuthor: Beede, Clara Frances McKeeReleased on Project Gutenberg: February 28, 2005