Adult 18+ sci-fi books

31370 books

Cloaked in Secrets
Cloaked in Secrets
Chautona Havig
PG-13
A Legend Reborn
A Legend Reborn
Steven Frankos
PG-13
Rainbows and Halos
Rainbows and Halos
Michelle Misra
PG-13
The Black Horn
The Black Horn
Clare Cooper
R
Carousel
Carousel
Linda Crockett
PG-13
Swords Against the Moon Men
Swords Against the Moon Men
Christopher Paul Carey
PG-13
Sabbat Martyr
Sabbat Martyr
Dan Abnett
G
There Are Giants in This Valley
There Are Giants in This Valley
Jack Hillman
PG-13
Slaughterhouse Five
Slaughterhouse Five
Kurt Vonnegut, Jr.
PG-13
The Seventh Secret
The Seventh Secret
Jennifer St. Clair
PG-13
Jason and the Escape from Bat Planet
Jason and the Escape from Bat Planet
Bob Ruddick; Gery Greer
PG-13
The Mysterious Hand; or, Subterranean Horrours!
The Mysterious Hand; or, Subterranean Horrours!
Augustus Jacob Crandolph
PG-13
The Blood Thief of Whitten Hall
The Blood Thief of Whitten Hall
Jon Messenger
PG-13
Dead! Dead! Dead!
Dead! Dead! Dead!
Paul Mannering; Bill Ball
PG-13
The Guardians of the Finisher's Fury
The Guardians of the Finisher's Fury
Frank L. Cole
PG-13
Attack of the Melonheads
Attack of the Melonheads
Gary Lee Vincent; Solon Tsangaras
PG-13
Project Gemini
Project Gemini
Jill Williamson
PG-13
The Human Thing
The Human Thing
Kathleen H. Nelson
R
Ondelle of Grioth
Ondelle of Grioth
Danika Dinsmore
PG-13
Escape to the Hiding Place
Escape to the Hiding Place
Marianne Hering; Marshal Younger
PG-13
Incendiary
Incendiary
Amy A. Bartol
PG-13
Children of Earth
Children of Earth
Paul J. Fleming
PG-13
Louie Makes a Splash!
Louie Makes a Splash!
Rachel Hamilton
PG-13
Snap of the Super-Goop
Snap of the Super-Goop
Troy Cummings
PG-13
The Secret Railway and the Crystal Caves
The Secret Railway and the Crystal Caves
Wendy Meddour
PG-13
The Fall of the House of Cabal
The Fall of the House of Cabal
Jonathan L. Howard
PG-13
The World of the Giant Ants
The World of the Giant Ants
A. Hyatt Verrill
PG-13
The Keeper of the Wind
The Keeper of the Wind
Charlotte Boyett-Compo
R
Fugitive
Fugitive
Devon C. Ford
PG-13
Return to Angel Hill
Return to Angel Hill
C. Dennis Moore; David Bain
PG-13