Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Algis Budrys
Murray Leinster
Evelyn E. Smith
A. H. Phelps
Randall Garrett and Robert Silverberg
Roger D. Aycock
Keith Laumer
Raymond F. Jones
Manly Wade Wellman
Henry Slesar
William Dixon Bell
Poul Anderson
James Causey
Alexei Panshin
Frank Belknap Long
Frank M. Robinson
Robert Emmett McDowell
Willard E. Hawkins
Richard McKenna
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.