Kilby, Clyde S. The Christian World of C. S. Lewis. Grand Rapids: Eerdmans, 1964.

Arnott, Ann. The Secret Country of C. S. Lewis. Grand Rapids: Eerdmans, 1975.

Lindskoog, Kathryn. Journey into Narnia. Pasadena: Hope Publishing House, 1998.

Hooper, Walter. Past Watchful Dragons: The Narnian Chronicles of C. S. Lewis. New York: Collier, 1979.

Hooper, Walter. C. S. Lewis: A Companion and Guide. London: HarperCollins, 1996.

Ford, Paul F. Companion to Narnia. San Francisco: Harper and Row, 1980. Rev. ed., 1994.

Gibson, Evan K. C. S. Lewis, Spinner of Tales: A Guide to His Fiction. Grand Rapids: 1980.

Hannay, Margaret Patterson. C. S. Lewis. New York: Ungar, 1981.

Manlove, Colin. The Chronicles of Narnia: The Patterning of a Fantastic World. New York: Twayne, 1993.