Sinister Barrier
Eric Frank Russell & Cameron Dokey
Spider-Man: The Sinister Six Combo
Adam-Troy Castro
Spider-Man: The Sinister Six Trilogy (99)
The Sinners of Erspia
Barrington J. Bayley
The Sirens of Titan
Kurt Vonnegut, Jr.
Sirius: A Fantasy of Love and Discord
Olaf Stapledon
siseneG
Arthur C. Clarke
Sister Emily's Lightship and Other Stories
Jane Yolen
Sister Time
John Ringo & Julie Cochrane
Cally O'Neals Story Arc (8)
Sisters
Greg Bear
The Six Directions of Space
Alastair Reynolds
Six Weeks in the Great Whirlpool
Noname & Luis P. Senarens
Sixth Column
Robert A. Heinlein
Sixty Days and Counting
Kim Stanley Robinson
Science in the Capital (3)
Sjambak
Jack Vance
Skeen's Leap
Jo Clayton
Skeen (1)
Skeen's Return
Skeen (2)
Skeen's Search
Skeen (3)
The Skeleton Lord's Key
Robert E. Vardeman
Keys to Paradise (2)
Skin Game
Charles E. Fritch
The Skinner
Neal Asher
Spatterjay (1)