Open Library
Sci-Fi
The future, written before it arrives.
20,963 books

Danger in Deep Space
Carey Rockwell

The Invasion
Katherine Applegate

Robots and Empire
Isaac Asimov

Breakfast of Champions
Kurt Vonnegut

Space Cadet
Robert A. Heinlein

The Space Merchants
Frederik Pohl

Virtual light
William Gibson

Imajica (The Fifth Dominion, Book 1)
Clive Barker

Gold
Isaac Asimov

To Ride Pegasus (The Talent #1)
Anne McCaffrey

Chocky
John Wyndham

Fantastic Voyage
Isaac Asimov

Wizard At Large
Terry Brooks

Rocannon's World
Ursula K. Le Guin

Majipoor Chronicles
Robert Silverberg

The Boggart (The Boggart #1)
Susan Cooper

Buy Jupiter, and other stories
Isaac Asimov

Now and Forever
Ray Bradbury

Many Waters (Time Quintet #4)
Madeleine L'Engle

Wool
Hugh Howey