Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Sir Charles Lyell
Ernst Haeckel
Samuel Butler
Thomas Henry Huxley
Joseph McCabe
Charles Darwin
Agnes Robertson Arber
Rudolf Schmid
Asa Gray
Charles Hodge
Eberhard Dennert
St. George Jackson Mivart
Walter Bagehot
Philip Henry Gosse
August Weismann
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.