Adult 18+ sci-fi books

31474 books

Aethersmith
Aethersmith
J. S. Morin
PG-13
Apex
Apex
Aer-ki Jyr
PG-13
Mind Slide
Mind Slide
Glenn Bullion
PG-13
Ashamet, Desert Born
Ashamet, Desert Born
Terry Jackman
PG-13
Dying Light
Dying Light
Scott Nicholson
PG-13
Owls to Athens
Owls to Athens
Harry Turtledove
R
Game's End, Part 1
Game's End, Part 1
Mamare Touno
PG-13
The Casquette Girls
The Casquette Girls
Alys Arden
PG-13
Insurgent Z
Insurgent Z
Mark C. Scioneaux; Dane Hatchell
PG-13
The Heir to the North
The Heir to the North
Steven Poore
PG-13
The Blackthorn Key
The Blackthorn Key
Kevin Sands
PG-13
Disruption
Disruption
Jessica Shirvington
PG-13
Darkest Hour
Darkest Hour
Jenny Carroll
PG-13
Attack of the 50-Ft. Cupid
Attack of the 50-Ft. Cupid
Jim Benton
PG-13
Owls to Athens
Owls to Athens
H. N. Turteltaub
PG-13
Key of Valor
Key of Valor
Nora Roberts
PG-13
Fangtastic!
Fangtastic!
Sienna Mercer
PG
The Air War
The Air War
Adrian Tchaikovsky
PG-13
Wayward
Wayward
Blake Crouch
PG-13
PathFinder
PathFinder
Angie Sage
PG-13
Dark Crusade
Dark Crusade
Karl Edward Wagner
R
The Defiance
The Defiance
Bill Baldwin
R
Born in Fire
Born in Fire
K. F. Breene
PG-13
The Horsemasters
The Horsemasters
Joan Wolf
R
Firehand
Firehand
Andre Norton; P. M. Griffin
PG
Proud Man
Proud Man
Katharine Burdekin
PG
Engelbrecht Again!
Engelbrecht Again!
Rhys Hughes
PG-13
The Serpent Gift
The Serpent Gift
Lene Kaaberbol
PG-13
False Gods
False Gods
Graham McNeill
PG-13
The Mean and Vulgar Bits
The Mean and Vulgar Bits
Kjartan Poskitt
PG-13