Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Frederic Arnold Kummer
Ben Bova
Michael Shaara
Raymond Z. Gallun
Randall Garrett
Stanley Mullen
John Brudy
Randall Garrett and Robert Silverberg
Sam Moskowitz
Bob Olsen
Nelson S. Bond
H. B. Fyfe
Jerome Bixby
Frederik Pohl
Mark Reinsberg
James R. Adams
Chester S. Geier
Charles A. Baker
Basil Wells
Charles V. De Vet
Allyn Donnelson
Poul Anderson
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.