Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Hanns Günther
Ernst Haeckel
Sara Ware Bassett
Helen R. Hull
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
United States. Arms Control and Disarmament Agency
Franklin D. Roosevelt
Lucien Poincaré
Ernest Rutherford
Fanny Walker Yeatman, Ruth Van Deman, and Consumer and Food Economics Institute
Walter Kellogg Towers
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.