Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
A. H. Evans
Various
William A. Riley and O. A. Johannsen
Frank Belknap Long
E. T. A. Hoffmann
Edwin LeFevre
Alfred Russel Wallace
Xenophon
Sir E. Ray Lankester
J. D. Beresford
Herbert David Croly
August Weismann
Herbert Spencer
Marie Curie
Thomas Henry Huxley
Ray Cummings
Jack London
Ernst Haeckel
Édouard Cuyer
Sir Ralph Payne-Gallwey
Jules Verne
Annette Fiske
René Descartes
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.