Adult 18+ sci-fi books

30978 books

Voice of the Eagle
Voice of the Eagle
Linda Lay Shuler
PG-13
The Machine Stops
The Machine Stops
Wayland Smith
G
Red Mercury
Red Mercury
Mark Fabi
R
Into the Deep
Into the Deep
Cindy R. Wilson
PG-13
Fireboy
Fireboy
Dean Whitlock
R
The Age of Asteroids
The Age of Asteroids
Elijah I. Toten
PG-13
The Secrets of Time
The Secrets of Time
Gary Sturm
PG-13
Invasion of the Onion Heads
Invasion of the Onion Heads
James McTague
PG-13
Boofalo: A Funny Book
Boofalo: A Funny Book
Richard S. Greene
PG-13
Gingerbread Economy
Gingerbread Economy
Lee McGeorge
PG-13
Ketha's Daughter
Ketha's Daughter
Suzanne Francis
G
Sleep
Sleep
Kat Meads
PG
Guardians of the Immortal Realms
Guardians of the Immortal Realms
Ruby Moon-Houldson
PG-13
Down Time
Down Time
Lane Cohen
G
The Rose of Camelot
The Rose of Camelot
James Philip Cox
PG-13
Far from Burden Dell
Far from Burden Dell
Chris Coppel
PG-13
Glory Be to Mars
Glory Be to Mars
Thomas W. Cronin
PG-13
Whose Top Reached the Heavens
Whose Top Reached the Heavens
Billy Joe Sharp, Jr.
PG-13
Light
Light
Paul Dale Anderson
PG-13
A Mine of Faults
A Mine of Faults
F. W. Bain
PG-13
Of Cabbages, Kings and Even (Odd) Queens of Wonderland and Oz
Of Cabbages, Kings and Even (Odd) Queens of Wonderland and Oz
James C. Wallace, II; Ron Baxley, Jr.
PG-13
Strange Brew
Strange Brew
Emma Weylin
PG-13
Wavefunction
Wavefunction
Bryony Pearce
PG-13
Two and Two Is Six
Two and Two Is Six
Eric Hatch
PG-13
Metagalaxy: The Beginnings
Metagalaxy: The Beginnings
Russell Scott
G
The Temple of Hashem
The Temple of Hashem
Hyam Yona Becker
PG-13
The Hundred-Acre Spaceship
The Hundred-Acre Spaceship
Ralph Roberts
PG-13
The Brugan
The Brugan
Stephen Moore
PG
Dr. Quantum in the Grandfather Paradox
Dr. Quantum in the Grandfather Paradox
Fred Alan Wolf
PG-13
The Planet Star Unfolding Prophecy
The Planet Star Unfolding Prophecy
C. M. Chakrabarti
PG-13