Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Gregor Mendel
Sir Daniel Wilson
William Bateson and Gregor Mendel
Sir E. Ray Lankester
Hugo de Vries
Sir A. E. Shipley
Paul Broca
An M. D.
Frank B. Cross and W. L. Minckley
Hobart M. Smith
Teodoro Pascal
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.