- Soldiers of FortuneAuthor: Richard Harding DavisLanguage: English
- Solomon's OrbitAuthor: William Carroll, John SchoenherrLanguage: English
- Some Everyday Folk and DawnAuthor: Miles FranklinLanguage: English
- Somebody's Little GirlAuthor: Martha YoungLanguage: English
- Someone Comes to Town, Someone Leaves TownAuthor: Cory DoctorowLanguage: English
- Something NewAuthor: P. G. (Pelham Grenville) WodehouseLanguage: English
- Somewhere in FranceAuthor: Richard Harding DavisLanguage: English
- Somewhere in Red GapAuthor: Harry Leon Wilson, Frederic Rodrigo Gruger, John R. (John Rea) Neill, Henry RaleighLanguage: English
- Son Excellence Eugène RougonAuthor: Émile ZolaLanguage: French
- Son of PowerAuthor: Will Levington Comfort, Zamin Ki DostLanguage: English
- Son PhilipAuthor: George Manville FennLanguage: English
- Sonnie-Boy's PeopleAuthor: James B. (James Brendan) ConnollyLanguage: English
- Sonny, a Christmas GuestAuthor: Ruth McEnery Stuart, Fanny Y. CoryLanguage: English
- Sons and LoversAuthor: D. H. (David Herbert) LawrenceLanguage: English
- Sons of the SoilAuthor: Honoré de Balzac, Katharine Prescott WormeleyLanguage: English
- Sous le burnousAuthor: Hector FranceLanguage: French
- South WindAuthor: Norman DouglasLanguage: English
- Souvenirs de la maison des mortsAuthor: Fyodor DostoyevskyLanguage: French
- Sowing and Reaping: A Temperance StoryAuthor: Frances Ellen Watkins Harper, Foster, Frances Smith [Editor]Language: English
- Sowing Seeds in DannyAuthor: Nellie L. McClungLanguage: English
- Space PlatformAuthor: Murray LeinsterLanguage: English
- Space PrisonAuthor: Tom GodwinLanguage: English
- Space TugAuthor: Murray LeinsterLanguage: English
- Space VikingAuthor: H. Beam Piper, John SchoenherrLanguage: English
- Spanish DoubloonsAuthor: Camilla KenyonLanguage: English
- Sparrows: The Story of an Unprotected GirlAuthor: Horace W. C. (Horace Wykeham Can) NewteLanguage: English
- Special MessengerAuthor: Robert W. (Robert William) ChambersLanguage: English
- SpiridionAuthor: George SandLanguage: French
- Spring DaysAuthor: George MooreLanguage: English
- Spring Street: A Story of Los AngelesAuthor: James Hugh RichardsonLanguage: English
- Springhaven: A Tale of the Great WarAuthor: R. D. (Richard Doddridge) BlackmoreLanguage: English
- Sprotje heeft een dienstAuthor: M. (Margo Sybranda Everdina) Scharten-AntinkLanguage: Dutch
- Square Deal SandersonAuthor: Charles Alden Seltzer, J. Allen (James Allen) St. JohnLanguage: English
- St. Cuthbert'sAuthor: Robert E. (Robert Edward) KnowlesLanguage: English
- St. ElmoAuthor: Augusta J. (Augusta Jane) EvansLanguage: English
- St. George and St. MichaelAuthor: George MacDonaldLanguage: English
- St. George and St. Michael, Volume 1Author: George MacDonaldLanguage: English
- St. George and St. Michael, Volume 3Author: George MacDonaldLanguage: English
- St. George's Cross; Or, England Above AllAuthor: H. G. (Henry George) KeeneLanguage: English
- St. Martin's SummerAuthor: Rafael SabatiniLanguage: English
- St. Ronan's WellAuthor: Walter ScottLanguage: English
- St. Winifred's; or, The World of SchoolAuthor: F. W. (Frederic William) Farrar, H. C. (Harold C.) EarnshawLanguage: English
- Stairway to the StarsAuthor: Larry T. ShawLanguage: English
- Stand by for Mars!Author: Rockwell, Carey, Willy Ley, Glanzman, Louis [Illustrator]Language: English
- Standish of Standish: A Story of the PilgrimsAuthor: Jane G. (Jane Goodwin) AustinLanguage: English
- Star BornAuthor: Andre NortonLanguage: English
- Star HunterAuthor: Andre NortonLanguage: English
- Star SurgeonAuthor: Alan Edward NourseLanguage: English
- Star-Dust: A Story of an American GirlAuthor: Fannie HurstLanguage: English
- Starr, of the DesertAuthor: B. M. BowerLanguage: English
- Stella Fregelius: A Tale of Three DestiniesAuthor: H. Rider (Henry Rider) HaggardLanguage: English
- StelloAuthor: Alfred de VignyLanguage: French
- Stephen Grattan's Faith: A Canadian StoryAuthor: Margaret M. (Margaret Murray) RobertsonLanguage: English
- Stepping HeavenwardAuthor: E. (Elizabeth) PrentissLanguage: English
- Steve YeagerAuthor: William MacLeod RaineLanguage: English
- Steve YoungAuthor: George Manville FennLanguage: English
- Still JimAuthor: Honoré MorrowLanguage: English
- Stolen TreasureAuthor: Howard PyleLanguage: English
- Stop Look and DigAuthor: George O. (George Oliver) SmithLanguage: English
- Storia di un'animaAuthor: Ambrogio BazzeroLanguage: Italian