- The Monadic Universe Short Story (short story by George Zebrowski and Gerald Hull published 1972)
- Santana Morning And Other Stories (anthology by Mike Dolan published 1979)
- Science Fiction: The Great Years (collection by Carol Pohl and Frederik Pohl published 1977)
- Search by the Foundation (short story by Isaac Asimov published 1949)
- Search by the Mule (short story by Isaac Asimov published 1948)
- Second Stage Lensmen (novel by E E doc Smith published 1953)
- The Second Weyr (short story by Anne McCaffrey published 1993)
- Secret Crimes (novelette by Robert Sampson published 1993)
- Security (novella by Brian M Stableford published 1979)
- Seeding Program (short story by James Blish published 1956)
- The Seedling Stars (collection by James Blish published 1957)
- Seetee Ship (novel by Jack Williamson published 1950)
- Seetee Shock (novel by Jack Williamson published 1949)
- Seven Days In New Crete (novel by Robert Graves published 1975)
- Shadowkeep (novel by Alan Dean Foster published 1984)
- Ship Of Shadows (novel by Fritz Leiber published 1982)
- The Singing Bell (short story by Isaac Asimov published 1968)
- Six Crystal Princesses (novel by Piers Anthony published Year)
- The Sixth Palace (short story by Robert Silverberg published 1965)
- Skeleton Key (novel by Piers Anthony published 2021)
- Skyclimber (novel by Raymond Z Gallun published 1981)
- Snow White And Rose Red (novel by Traditional published Year)
- So Long And Thanks For All The Fish (novel by Douglas Adams published 1984)
- Soldier, Ask Not (novel by Gordon R Dickson published 1967)
- The Source Of Magic (novel by Piers Anthony published 1979)
- Space for Industry (essay by John W Campbell published 1960)
- Space Lords (collection by Cordwainer Smith published 1965)
- The Space Machine (novel by Christopher Priest published 1981)
- The Space Vampires (novel by Colin Wilson published 1976)
- A Spell for Chameleon (novel by Piers Anthony published 1977)
- The Spirit of Dorsai (collection by Gordon R Dickson published 1979)
- SS-GB (novel by Len Deighton published 1978)
- The Stainless Steel Rat (novel by Harry Harrison published 1966)
- The Stainless Steel Rat For President (novel by Harry Harrison published 1988)
- A Stainless Steel Rat Is Born (novel by Harry Harrison published 1985)
- The Stainless Steel Rat Saves The World (novel by Harry Harrison published 1978)
- The Stainless Steel Rat Wants You (novel by Harry Harrison published 1985)
- The Stainless Steel Rat's Revenge (novel by Harry Harrison published 1977)
- Stance Of Splendor (short story by George Zebrowski published 1973)
- The Star (short story by David H Keller M D published 1964)
- Star Quest (novel by Robert E Mills published 1978)
- Starcrossed (short story by George Zebrowski published 1973)
- Stephen Comes Into Courage (novelette by Rick Wilber published 1993)
- Stork Naked (novel by Piers Anthony published 2006)
- Storm Season (collection by Robert Asprin published 1985)
- Strange Playfellow (short story by Isaac Asimov published 1940)
- Surface Tension (short story by James Blish published 1952)
- Swell Foop (novel by Piers Anthony published 2001)