Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Asa Gray
Frederick Leslie Robertson
Eberhard Dennert
Wallace West
Lucien Poincaré
Ernst Haeckel
Herbert Spencer
Sidney Lewis Gulick
Thomas Henry Huxley
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Florence Mary Gardiner
Thomas Wemyss Fulton
Cyril Field
Wilfred Mark Webb
Theodore Roosevelt
Walter Bagehot
St. George Jackson Mivart
Robert T. Browne
August Weismann
Samuel Butler
F. B. Jevons
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.