Indians
Free to read here, from Project Gutenberg.
The Native Races [of the Pacific states], Volume 5, Primitive History
The Native Races [of the Pacific states], Volume 3, Myths and Languages
Essays of an Americanist
The Native Races [of the Pacific states], Volume 2, Civilized Nations
The Native Races [of the Pacific states], Volume 1, Wild Tribes
Adair's History of the American Indians
The Prehistoric World; Or, Vanished Races
Compendio de la historia general de América. Tomo I
The Myths of the New World
The North Americans of Antiquity
The Native Races [of the Pacific states], Volume 4, Antiquities
American Hero-Myths: A Study in the Native Religions of the Western Continent
The American Nations, Vol. I.
The American Race
Art in Shell of the Ancient Americans
Early Man in the New World
Lives of Famous Indian Chiefs
La cruz en América (Arqueología Argentina)
Ancient America, in Notes on American Archaeology
The History of Ancient America, Anterior to the Time of Columbus
I. Origen de los indios de América. II. Origen y civilizaciones de los indígenas del Perú.
The Indian Chief: The Story of a Revolution
Los Indios, su Historia y su Civilización
The Story of Extinct Civilizations of the West
Vestiges of the Mayas
Catalogo de los Objetos Etnologicos y Arqueologicos Exhibidos por la Expedición Hemenway
The Philosophic Grammar of American Languages, as Set Forth by Wilhelm von Humboldt
A Record of Study in Aboriginal American Languages
American Languages, and Why We Should Study Them
Some Observations on the Ethnography and Archaeology of the American Aborigines
Prehistoric Structures of Central America: Who Erected Them?
Travels Amongst American Indians, Their Ancient Earthworks and Temples
Incentives to the Study of the Ancient Period of American History