Commire, Anne, ed. Something About the Author. Vol. 47. Detroit: Gale Research, 1987. Christopher explains his method of writing.

Holtze, Sally H., ed. Fifth Book of Junior Authors and Illustrators. New York: H.W. Wilson, 1983. Presents an autobiographical sketch of Christopher and his philosophy on writing.

Lesniak, James G., ed. Contemporary Authors. New Revision Series. Vol.

36. Detroit: Gale, 1992. This article contains a brief biography of Christopher and lists his works and awards.