Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Ray Stannard Baker
William Whewell
Hermann von Helmholtz
John Chronic and Halka Chronic
Charles Singer
Jules Verne
William Jackson
United States. National Aeronautics and Space Administration
H. de Graffigny
Frederik van Eeden
Albert H. Buck
Gabriel de Tarde
Frank Benton
Robert Shea
comte de Georges Louis Leclerc Buffon
Algernon Blackwood
Dick Donovan
Isaac Asimov
Charles Thom and W. W. Fisk
Various
James Buckman
Edgar Rice Burroughs
Harold Jacoby
Maynard Shipley
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.