Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
William T. Hornaday
John Muir
Robert Ezra Park, E. W. Burgess, and Roderick Duncan McKenzie
Louis M. Roth and Edwin R. Willis
Alfred Russel Wallace
Frederic E. Clements
Alexander von Humboldt
A. F. W. Schimper
L. David Mech, Louis Daniel Frenzel, Robert R. Ream, John W. Winship, and P. D. Karns
Henry S. Fitch
Tadashi Nakashima
Napier Shelton and Natt N. Dodge
William Edward Duellman
William Wood
Dennis G. Rainey and Henry S. Fitch
John George Francis
Charles L. Douglas
Henry S. Fitch and Lewis L. Sandidge
Wilhelm Bölsche
Varley Lang
Arabella B. Buckley
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.