Carpenter, Humphrey, and Mari Prichard. The Oxford Companion to Children's Literature. New York: Oxford University Press, 1984. Includes a brief biographical and critical note.

Crouch, Marcus. The Nesbit Tradition: The Children's Novel in England 19451970. London: Ernest Benn, 1972.

Christopher's novels are treated briefly in a chapter devoted to science fiction.

Gough, John. "An Interview with John Christopher." Children's Literature in Education 15 (Summer 1984): 93-102.

This article is based on the author's correspondence with Christopher.

Hillegas, Mark R. The Future as Nightmare: H. G. Wells and the AntiUtopians. Carbondale: Southern Illinois University Press, 1967. In addition to Wells, Hillegas considers authors Karel Capek, Aldous Huxley, and George Orwell, as well as some later dystopian writers.

Kirkpatrick, D. L., ed. Twentieth Century Children's Writers. 2d ed. New York: St. Martin's Press, 1983. Contains a short critical commentary with an extensive bibliography.

Milner, Joseph O. "Oathkeepers and Vagrants: Meliorists and Reactive World...