Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
John Dewey
Charles Darwin
Jean-Jacques Rousseau
Henry David Thoreau
Robert Hooke
O. Henry
the Elder Pliny
G. K. Chesterton
Isaac Newton
United States. Bureau of Animal Industry, Leonard Pearson, Rush Shippen Huidekoper, Charles B. Michener, and W. H. Harbaugh
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John Muir
John Burroughs
graf Leo Tolstoy
Lucien Biart
Alfred Russel Wallace
William Henry Fox Talbot
Edward Jesse
Adam Smith and M. Garnier
T. H. Pardo de Tavera
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.