Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Sylvanus Griswold Morley
Alfred M. Tozzer and Glover M. Allen
Ernst Wilhelm Förstemann
Daniel G. Brinton
Edward S. Holden
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.