The Religious Sentiment / Its Source and Aim: A Contribution to the Science and / Philosophy of Religion

The Philosophic Grammar of American Languages, as Set Forth by Wilhelm von Humboldt / With the Translation of an Unpublished Memoir by Him on / the American Verb

The Myths of the New World / A Treatise on the Symbolism and Mythology of the Red Race of America

American Hero-Myths / A Study in the Native Religions of the Western Continent

The Books of Chilan Balam, the Prophetic and Historic Records of the Mayas of Yucatan

Nagualism / A Study in Native American Folk-lore and History