Adult 18+ sci-fi books

31370 books

Alien in Chief
Alien in Chief
Gini Koch
PG-13
Liberty
Liberty
Alexis Hall
PG-13
Campaign 2100: Game of Scorpions
Campaign 2100: Game of Scorpions
Larry Hodges
PG-13
Camp Alien
Camp Alien
Gini Koch
PG-13
Rise of the Robot Army
Rise of the Robot Army
Robert Venditti
PG-13
Shaw
Shaw
Anna Hackett
PG-13
Enslavement
Enslavement
Melinda Friesen
PG-13
Lover Avenged
Lover Avenged
J. R. Ward
R
Vengeance in Death
Vengeance in Death
Nora Roberts
PG-13
How to Break a Dragon's Heart
How to Break a Dragon's Heart
Cressida Cowell
PG-13
The Hidden Deep
The Hidden Deep
Christa Kinde
PG-13
Lorimal's Chalice
Lorimal's Chalice
Jane Fletcher
PG-13
The Plant That Ate Dirty Socks Goes Hollywood
The Plant That Ate Dirty Socks Goes Hollywood
Nancy McArthur
R
Tripping Through Time
Tripping Through Time
Mary M. Ricksen
PG-13
GhosTV
GhosTV
Jordan Castillo Price
PG-13
Desperate Housewives of Avalon
Desperate Housewives of Avalon
Saranna DeWylde
PG-13
Dinotopia: Journey to Chandara
Dinotopia: Journey to Chandara
James Gurney
PG-13
Star Ship on Saddle Mountain
Star Ship on Saddle Mountain
Atlantis Hallam
G
The Three Thorns
The Three Thorns
Michael Gibney
PG-13
Alien Contact for Kid Sisters
Alien Contact for Kid Sisters
Edward Hoornaert
PG-13
The Innocent
The Innocent
Michelle K. Pickett
PG-13
Blood and Metal
Blood and Metal
Nina Croft
PG-13
The Power Within
The Power Within
H. K. Varian
PG-13
Dark Father
Dark Father
James Cooper
PG-13
The Nemesis Charm
The Nemesis Charm
Daniel Ingram-Brown
PG-13
My Gym Teacher Is an Alien Overlord
My Gym Teacher Is an Alien Overlord
David Solomons
PG-13
Soma
Soma
Charlee Jacob
PG-13
Frankenstein: The True Story
Frankenstein: The True Story
Don Bachardy; Christopher Isherwood
PG-13
Forsaking Home
Forsaking Home
A. American
PG-13
The Horizon
The Horizon
Michael Stephen Fuchs; Glynn James
PG-13