Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Edgar Rice Burroughs
Various
Sir E. Ray Lankester
John Victor Lacroix
Sax Rohmer
R. Cadwallader Smith
Stewart Lygon Murray
John Harper
P. W. Bridgman
Edward S. Holden
J. B. S. Haldane
W. B. O'Shaughnessy
Edgar Pangborn
Ray Bradbury
G. Maspero
Jules Verne
Charles Lee Lewis
Annie F. Johnston
Joseph Conrad and Ford Madox Ford
Gerard W. Bancks
Thomas Henry Huxley
Alexandre Dumas
Franklin Beech
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.