Books in Science Fiction (sorted alphabetically)
- Solid Solution James Stamers
- Solomon's Orbit William Carroll
- Someone Comes to Town, Someone Leaves Town Cory Doctorow
- Someone to watch over me H. L. Gold and Floyd C. Gale
- Something Will Turn Up David Mason
- Song in a Minor Key C. L. Moore
- Sordman the Protector Tom Purdom
- Sorry: Wrong Dimension Ross Rocklynne
- So They Baked a Cake Winston K. Marks
- Sound of Silence Barbara Constant
- Spacehounds of IPC E. E. Smith
- Spacemen Die at Home Edward W. Ludwig
- Spacemen Never Die! Morris Hershman
- Space Pioneers Carey Rockwell
- Space Platform Murray Leinster
- Space Prison Tom Godwin
- Space Rover Edwin K. Sloat
- Spaceship Named McGuire Randall Garrett
- Space Station 1 Frank Belknap Long
- Space Tug Murray Leinster
- Space Viking H. Beam Piper
- Spacewrecked on Venus Neil R. Jones
- Spawn of the Comet H. Thompson Rich
- Spicy Sound of Success Jim Harmon
- Spies Die Hard! Arnold Marmor