Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Arthur Conan Doyle
Edgar Rice Burroughs
William Diller Matthew
Frederic A. Lucas
John M. Good, Theodore Elmer White, and Gilbert F. Stucker
Richard Owen
Edmond Hamilton
Charles H. Sternberg
F. H. Costello
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.