Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
William Blaikie
J. Arthur Thomson
Winston K. Marks
Herbert Spencer
Albert Einstein
H. P. Lovecraft
Robert Louis Stevenson
Various
Benjamin Franklin
David Brewster
John Tyndall
1415 downloads
John William Draper
Unknown
Charles Frederick Kroeh
Fred Eugene Leonard
Hippocrates
Silvanus P. Thompson
Thomas Henry Huxley
Garrett Putman Serviss
Sir Oliver Lodge
Thomas Nathaniel Orchard
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.