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

Crago, Hugh, and Maureen Crago.

"John Christopher: An Assessment with Reservations." Children's Book Review 1 (June 1971): 77-79. This article finds The Tripods Trilogy predictable, lacking in conviction, and lacking real literary excellence.

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.

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 Views in Science Fiction."

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