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