Aldiss, Brian W. "From Barsoom to Beyond the Borderlands: Swords, Sorceries and Zitdars." In Trillion Year Spree: The History of Science Fiction. 2nd ed. New York: Avon Books, 1986.

Aldiss summarizes Burroughs's contribution to science fiction.

Gunn, James. Alternate Worlds: The Illustrated History of Science Fiction. New York: A & W Visual Library, 1975.

Discusses Burroughs's successful career.

Lupoff, Richard A. Edgar Rice Burroughs: Master of Adventure. New York: Ace, 1968. Provides information on Burroughs's sources and evaluations of his books.

Nicholls, Peter, et al., eds. The Science Fiction Encyclopedia. Garden City, NY: Doubleday, 1979. Contains an overview of Burroughs's career, and examines The Land That Time Forgot in the perspective of Burroughs's overall literary achievement.

Porges, Irwin. Edgar Rice Burroughs: The Man Who Created Tarzan. Provo, UT: Brigham Young University Press, 1975. The standard biography, exhaustively detailed.