13 books
The Books of Chilan Balam
Giordano Bruno
The Native Calendar of Central America and Mexico
Races and Peoples
The Battle and the Ruins of Cintla
On the Xinca Indians of Guatemala
The Religious Sentiment
Notes on the Floridian Peninsula
The Myths of the New World
American Hero-Myths. a Study in the Native Religions of the Western Continent
The American Race
The Basis of Social Relations; A Study in Ethnic Psychology
The Basis of Social Relations, a Study of Ethnic Psychology;