Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Daniel Kirkwood
William F. Denning
W. Mattieu Williams
Robert P. Multhauf
Charles Kingsley
Robert S. Ball
William Crookes
Harry Collingwood
Jean M. Thompson
Richard A. Proctor
Alexander McAdie
Royal Geographical Society
Jules Verne
Agnes M. Clerke
Mary Proctor
A. W. Greely
Neil R. Jones
Harry Cord and Otis Adelbert Kline
A. C. Gilbert
Edward King
Charles Fitzhugh Talman
Ray Cummings
Willis L. Moore
Henry Kuttner
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.