Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
William James
Michael Faraday
Edward B. Tylor
Thomas Commerford Martin
George Francis Dow and John Henry Edmonds
David Livingstone
P. H. Ditchfield
Charles Darwin
John Venn
Lewis M. Terman
Lewis Henry Morgan
Robert Ezra Park, E. W. Burgess, and Roderick Duncan McKenzie
Brendan P. Kehoe
Francis Galton
Santiago Ramón y Cajal
Charles Seignobos and Charles Victor Langlois
Zelia Nuttall
Walter B. Cannon
Muḥammad Shafīq Ghurbāl
William Stanley Jevons
United States. Agricultural Research Service. Consumer and Food Economics Research Division
United States. Bureau of the Census
Sinclair Lewis
Charles Babbage
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.