Labbe, Dolores Egger. The Louisiana Purchase and Its Aftermath. Lafayette: University of Southwestern Louisiana, 1998.
Ronda, James P. Lewis and Clark among the Indians. Lincoln: University of Nebraska Press, 1984.
Stephanson, Anders. Manifest Destiny: American Expansionism and the Empire of Right. New York: Hill and Wang, 1995.
White, Richard. “It’s Your Misfortune and None of My Own”: A New History of the American West. Norman: University of Oklahoma Press, 1991.
Patterson, Marie. Early American Indian Tribes, Primary Source Readers. Huntington Beach, CA: Teacher Created Materials, 2004.
Pauketat, Timothy R. Cahokia: Ancient America's Great City on the Mississippi. New York: Penguin, 2009.
Diffie, Bailey W., and George D. Winius. Foundations of the Portuguese Empire, 1415–1580. Minneapolis: University of Minnesota Press, 1977.
Hammond, Norman. Ancient Maya Civilization. New Brunswick, NJ: Rutgers University Press, 1982.
Lockhart, James, and Stuart B. Schwartz. Early Latin America: A History of Colonial Spanish America and Brazil, Cambridge Latin American Studies. Cambridge: Cambridge University Press, 1983.
Maestro, Betsy C. Exploration and Conquest: The Americas after Columbus, 1500–1620. With illustrations by Giulio Maestro. New York: Harper Collins Publishers, 1994.