Kingman, Lee, ed. Newbery and Caldecott Medal Books, 1956-1965. Boston: Horn Book, 1965. The article on L'Engle includes an excerpt from A Wrinkle in Time, her acceptance speech for the Newbery Medal, and a delightful biographical article by her husband, Hugh Franklin.

L'Engle, Madeleine. Trailing Clouds of Glory: Spiritual Values in Children's Literature. Philadelphia: Westminster, 1975. A discussion of the need for children's literature to provide spiritual touchstones, with excerpts from many classic children's books that L'Engle sees as fulfilling this need.

Newquist, Roy. Conversations. Skokie, IL: Rand McNally, 1967. A more compact discussion of many of the issues L'Engle touches on in her autobiographical work A Circle of Quiet.

Townsend, John Rowe. A Sense of Story: Essays on Contemporary Writers for Children. London: Longman, 1971.

The essay on L'Engle is a thematic discussion of the Austin and Murry books and includes an extract from a paper she gave...