Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Charles Darwin
Lucien Biart
John Muir
Henry Walter Bates
W. N. P. Barbellion
Henry David Thoreau
Richard Jefferies
Henry Beston
Francis Hobart Herrick
Joseph Dalton Hooker
Sir E. Ray Lankester
John James Audubon
John Burroughs
Roy Chapman Andrews
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.