Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Ernst Haeckel
Helen R. Hull
Sara Ware Bassett
Allen Chapman
Ralph Milne Farley
Norman F. Joly
Walter Libby
Wayne Whipple and S. F. Aaron
A. Frederick Collins
James R. Driscoll
Marie Curie
Carl R. Maag and Steve Rohrer
Alfred Powell Morgan
Upton Sinclair
Franklin D. Roosevelt
United States. Arms Control and Disarmament Agency
Fanny Walker Yeatman, Ruth Van Deman, and Consumer and Food Economics Institute
Ernest Rutherford
Lucien Poincaré
Walter Kellogg Towers
Isaac Asimov and Theodosius Dobzhansky
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.