Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Walter Woelber Dalquest
Ray D. Burkett
William Elliot Griffis
David Hume
William Curtis
Enos A. Mills
E. N. Woodcock
Various
H. L. Mencken
José S. Alvarez
the Elder Pliny
British Association for the Advancement of Science
Charles Dudley Warner
854 downloads
John James Audubon
Mabel Osgood Wright and Elliott Coues
William T. Hornaday
Alexander von Humboldt and Aimé Bonpland
Asa Gray
Frances Simpson
John Timbs
John Ruskin
Pliny Earle Goddard
J. A. Zahm
Luigi Capuana
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.