Adult 18+ sci-fi books

30997 books

Heir to the Shadows
Heir to the Shadows
Anne Bishop
PG-13
Dark Peril
Dark Peril
Christine Feehan
R
Hair Ball from Outer Space
Hair Ball from Outer Space
Kirk Scroggs
PG-13
To Sail a Darkling Sea
To Sail a Darkling Sea
John Ringo
PG-13
Invasion of the Overworld
Invasion of the Overworld
Mark Cheverton
R
Billy Buck
Billy Buck
Josephine Poole
PG-13
In the Face of My Enemy
In the Face of My Enemy
Joseph H. Delaney
R
The Hero
The Hero
Patricia Windsor
G
The Lake House
The Lake House
James Patterson
PG-13
Challenge
Challenge
Kenneth Bulmer
PG-13
Escaping Home
Escaping Home
A. American
PG-13
Violet in Jewel Forest
Violet in Jewel Forest
Poppy Collins
PG-13
Tom Swift and the City of Gold
Tom Swift and the City of Gold
Victor Appleton, II
PG-13
Tiger's Quest
Tiger's Quest
Colleen Houck
PG-13
Wedgewood Grey
Wedgewood Grey
John Aubrey Anderson
PG-13
The Book of David
The Book of David
Robert Boyczuk
PG-13
Bramblestar's Storm
Bramblestar's Storm
Erin Hunter
PG-13
Letters to an Android
Letters to an Android
Wendy Rathbone
PG-13
Masterminds
Masterminds
Gordon Korman
PG-13
San Francisco Night
San Francisco Night
Stephen Leather
PG-13
Emily Windsnap and the Ship of Lost Souls
Emily Windsnap and the Ship of Lost Souls
Liz Kessler
PG-13
Divine Dora
Divine Dora
Claire Chilton
PG-13
The Knight Marshal
The Knight Marshal
Karen Azinger
PG-13
Anywhere in Time
Anywhere in Time
Melissa Mayhue
PG-13
Slaves of the Lamp
Slaves of the Lamp
Pamela Frankau
PG-13
Deceiver
Deceiver
C. J. Cherryh
PG-13
Darkest Hour
Darkest Hour
Tony Russo
PG-13
Earth Flight
Earth Flight
Janet Edwards
PG-13
Falkner
Falkner
Mary Shelley
PG-13
Return to a Strange World
Return to a Strange World
Hiroyuki Morioka
PG-13