Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
John F. W. Herschel
Alexander Findlay
John Timbs
Henry Pemberton
Ralph Connor
Camille Flammarion
Kuo Shen
John Lord
S. M. Lambert
Amelia Young
John Elliot Drinkwater Bethune
George Biddell Airy
Denison Olmsted
Giovanni Aldini
Walter Jerrold
Thomas Henry Huxley
J. P. Mahaffy
James Ferguson
H. A. Lorentz
Charles Babbage
Bernard D. Bolas
Various
Sir John Lubbock
Isaac Asimov
Birney C. Batcheller
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.