Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Bertrand Russell
Niels Bohr
National Atomic Museum
United States. Army. Corps of Engineers. Manhattan District
White Sands Missile Range . Public Affairs Office
1135 downloads
Ray Cummings
Carl R. Maag and Steve Rohrer
Various
Isaac Asimov and Theodosius Dobzhansky
Isaac Asimov
John Burroughs
Arthur E. Bostwick
Charles L. Fontenay
John Dalton
Mary Somerville
610 downloads
R. S. Warren Bell and Thomas F. G. Coates
United States. Maritime Administration, United States. Department of Commerce, and U.S. Atomic Energy Commission
Philip Wylie
Loyce J. McIlhenny
E. W. Seabrook Hull
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.