Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Robert S. Ball
Galileo Galilei and Johannes Kepler
Camille Flammarion
Agnes M. Clerke
Charles Fort
Alexander von Humboldt
David Brewster
Parallax
John Henry Pepper
E. W. Bullinger
James P. Boyd
Muḥammad ibn Aḥmad Bīrūnī
Sir Oliver Lodge
Richard A. Proctor
George Forbes
Garrett Putman Serviss
Orison Swett Marden
J. Malcolm Bird
William Tyler Olcott
Richard Adams Locke
1126 downloads
E. Walter Maunder
1082 downloads
Thomas Nathaniel Orchard
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.