Commire, Anne, ed. Something about the Author. Vol. 45. Detroit: Gale Research, 1986. The entry on North, expanded from that presented in volume 1 of this series, provides a complete and valuable review of his career with an emphasis on the extent of his literary production and the popularity of his work.

De Montreville, Doris, and Donna Hill, eds. Third Book of Junior Authors. New York: H. W. Wilson, 1972. Contains an autobiographical sketch by North.

Kirkpatrick, D. L., ed. Twentieth-Century Children's Writers. 2d ed. New York: St. Martin's Press, 1983. This source presents an excellent bibliographical review of North's career and a short but insightful analysis of his literary achievements.