Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
August Weismann
F. Edward Hulme
Various
Robert Alexander Craig
Linnean Society of London
J. Ritzema Bos
Harry Johnston
Eadweard Muybridge
Robert Smith
Edmund Lester Pearson
Thomas Garnett
Oliver Herford and Curtis Dunham
Cornelis Johannes Kieviet
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Lee R. Dice and Harley Bakwel Sherman
Agnes Giberne
William Osmer
Mason Augustus Walton
Alfred Edmund Brehm
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.