Adult 18+ sci-fi books

31370 books

The Kairos Mechanism
The Kairos Mechanism
Kate Milford
PG-13
The Countdown Conspiracy
The Countdown Conspiracy
Katie Slivensky
PG-13
The First Heretic
The First Heretic
Aaron Dembski-Bowden
R
The Outskirter's Secret
The Outskirter's Secret
Rosemary Kirstein
R
Battle Lines
Battle Lines
Will Hill
PG-13
The System of the World
The System of the World
Neal Stephenson
PG-13
The Return of the Goddess: A Divine Comedy
The Return of the Goddess: A Divine Comedy
Elizabeth Cunningham
R
Thor's Serpents
Thor's Serpents
Kelley Armstrong; Melissa Marr
PG-13
The Space Captain's Courtesan
The Space Captain's Courtesan
K. C. Klein
PG-13
Randoms
Randoms
David Liss
PG-13
Stormbreak
Stormbreak
Chris Pourteau
PG-13
The Wives' Tale
The Wives' Tale
Alix Wilber
PG-13
The Sea of Time
The Sea of Time
P. C. Hodgell
PG-13
Shadowed: The Final Judgment
Shadowed: The Final Judgment
Jerry B. Jenkins
PG-13
Safely You Deliver
Safely You Deliver
Graydon Saunders
PG-13
The Lost Patrol
The Lost Patrol
Vaughn Heppner
R
Freddie's Shadow Cards
Freddie's Shadow Cards
Jessica Brody
PG-13
Breaker
Breaker
Emma Raveling
PG-13
The Warrior's Prize
The Warrior's Prize
Claire Delacroix
PG-13
The Whispers in the Walls
The Whispers in the Walls
Sophie Cleverly
PG-13
Dreamspy
Dreamspy
Jacqueline Lichtenberg
PG-13
Kensho
Kensho
Dennis Schmidt
PG-13
The Big Joke Game
The Big Joke Game
Scott Corbett
PG-13
Good Ogre
Good Ogre
Platte F. Clark
PG-13
Stand Against the Storm
Stand Against the Storm
Peter Grant
PG-13
The Lineage
The Lineage
Brian P. Easton
PG-13
The Griefer's Revenge
The Griefer's Revenge
Winter Morgan
R
Colossus
Colossus
Colin Falconer
PG-13
Miami!
Miami!
Giada De Laurentiis
PG-13
Iniquity
Iniquity
Amy A. Bartol
PG-13