John S. Kennedy, "John Steinbeck. Life Affirmed and Dissolved," in Steinbeck and His Critics A Record of Twenty-five Years, edited by E W Tedlock, Jr. and C.V. Wicker, University of New Mexico Press, 1957, pp. 119-34.

Todd M. Lieber, 'Talismanic Patterns in the Novels of John Steinbeck," in American Literature, May, 1972, pp 262-75.

Peter Lisca, "Escape and Commitment-Two Poles of the Steinbeck Hero," in Steinbeck; The Man and His Work, p. 322.

Harry Morns, "The Peart Realism and Allegory," in English Journal, Vol. LH., No 7, October, 1963, pp. 487-505.