Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Randall Garrett
Henry Still
Donald E. Westlake
Robert E. Gilbert
Robert Silverberg
George O. Smith
Lester Del Rey
Albert dePina
Bryce Walton
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.