Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Robert Hunt
active 13th century de Maricourt Pierre
N. Hawkins
James J. Walsh and Brother Potamian
Mrs. John Herschel
Various
Max Planck
Karl von Gebler
Honoré de Balzac
Simon Newcomb
Frederick Treves
Bernard Simon Talmey
J. G. Wood
Camille Flammarion
I. A. R. Wylie
baron d' Paul Henri Thiry Holbach
E. S. Keene
Robert Louis Stevenson
Christiaan Huygens
Glen W. Watson
William Whewell
Bertha May Clark
James J. Walsh
Jabez Hogg
Garrett Putman Serviss
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.