Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Jules Verne
William Carpenter
David Lindsay
Ray Bradbury
Voltaire
Otis Adelbert Kline
Garrett Putman Serviss
Mark Wicks
Parallax
G. K. Chesterton
Niels Meyn and August Klingsey
Various
Edgar Rice Burroughs
John Uri Lloyd
F. L. Wallace
Mark Twain
Ludvig Holberg
Donald A. Wollheim
Percival Lowell
Philip K. Dick
Mark Clifton
John J. McGuire and H. Beam Piper
John Jacob Astor
Raymond Z. Gallun
These books are free to read. Each is in the public domain in the United States; check your own country's rules before you copy or share one.