Laxmi Bachanalaya
Legally available public-domain books and openly licensed reading materials.
Xenophon
Gasparo Scaruffi, active 1613 Antonio Serra, and Geminiano Montanari
David Ricardo
John Rae
Various
Francis W. Hirst
Charles Lever
Hilaire Belloc
T. R. Malthus
Antero de Quental
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.