Adult 18+ sci-fi books

31474 books

The Fran That Time Forgot
The Fran That Time Forgot
Jim Benton
PG
Alien Bodies
Alien Bodies
Lawrence Miles
G
Eye of the Storm
Eye of the Storm
John Ringo
PG-13
Live Free Or Die
Live Free Or Die
John Ringo
R
Immortal War
Immortal War
Justin Somper
PG-13
The Endless Knot
The Endless Knot
Stephen Lawhead
PG-13
The Ghosts of Tupelo Landing
The Ghosts of Tupelo Landing
Sheila Turnage
PG-13
The Last Deathship Off Antares
The Last Deathship Off Antares
William John Watkins
PG-13
The Cloud of Desolation
The Cloud of Desolation
Sam Baneham
PG-13
Prelude to Foundation
Prelude to Foundation
Isaac Asimov
PG
Mind-Surfer
Mind-Surfer
Mark Leon
PG-13
Lyonesse: The Green Pearl
Lyonesse: The Green Pearl
Jack Vance
PG-13
Death Planet
Death Planet
P. M. Griffin
PG-13
The Zondon
The Zondon
Robby Charters
PG-13
Songsmith
Songsmith
Andre Norton; A. C. Crispin
PG
Neptune's Cauldron
Neptune's Cauldron
Michael G. Coney
PG-13
The Hunted
The Hunted
L. A. Banks
G
The Siege
The Siege
Bill Baldwin
PG-13
The City of Hermits
The City of Hermits
Gina Covina
PG-13
Callahan's Legacy
Callahan's Legacy
Spider Robinson
R
Streams of Silver
Streams of Silver
R. A. Salvatore
PG-13
Angles of Attack
Angles of Attack
Marko Kloos
R
Once in a Blue Moon
Once in a Blue Moon
Simon R. Green
PG
The Frontier
The Frontier
Kenneth Tam
PG-13
Super Hero
Super Hero
Diane Merlin
PG-13
The Secret in the Forest
The Secret in the Forest
JoElle Martin
PG-13
All for You
All for You
Lynn Kurland
PG-13
Alien in the House
Alien in the House
Gini Koch
PG-13
Trophy: Decision
Trophy: Decision
Paul M. Schofield
PG-13
The Seventh Scroll
The Seventh Scroll
Wilbur Smith
PG-13