Books in Science Fiction (sorted alphabetically)
- Silver Menace Murray Leinster
- Sinister Paradise Robert Moore Williams
- Sjambak Jack Vance
- Skin Game Charles E. Fritch
- Skull Philip K. Dick
- Sky Is Falling Lester Del Rey
- Skylark of Space E. E. Smith and Lee Hawkins Garby
- Skylark Three E. E. Smith
- Sky Trap Frank Belknap Long
- Slave is a Slave H. Beam Piper
- Slave Planet Laurence M. Janifer
- Slaves of Mercury Nathan Schachner
- Sleeper Awakes H. G. Wells
- Slingshot Irving W. Lande
- Slizzers Jerome Bixby
- Small World William F. Nolan
- Small World of M-75 Ed M. Clinton
- Smiler Albert Hernhuter
- Snare Richard Rein Smith
- Snowball Effect Katherine MacLean
- Sodom and Gomorrah, Texas R. A. Lafferty
- Solander's Radio Tomb Ellis Parker Butler
- Solar Magnet S. P. Meek
- Solar Stiff Chas. A. Stopher
- Soldier Boy Michael Shaara