Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Various
Jean-Henri Fabre
Sir John William Dawson
Alexander von Humboldt
Jack London
E. Stenhouse
Robert H. Mohlenbrock
Alfred Russel Wallace
Harry Johnston
Patrick Matthew
J. West
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.