Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Charles Darwin
Jagadis Chandra Bose
Jean-Henri Fabre
Erasmus Darwin
Douglas English
Henry Walter Bates
Maurice Maeterlinck
William Kirby and William Spence
Robert Chambers
Thomas Henry Huxley
William T. Hornaday
Catherine Cooper Hopley
W. T. Calman
Augusta Foote Arnold
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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.