L'Engle, Madeleine. Trailing Clouds of Glory: Spiritual Values in Children's Books. Louisville, KY: Westminster, 1985. Discusses the religious aspects of children's literature.

Townsend, John Rowe. A Sense of Story: Essays on Contemporary Writing for Children. Philadelphia: Lippincott, 1971. Discusses the major concerns of L'Engle's fiction and evaluates its importance.