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Bloom, Harold, ed. Graham Greene. New York: Chelsea House, 1987.

Cassis, A.F., ed. Graham Greene: Man of Paradox. Chicago: Loyola University Press, 1994.

Couto, Maria. Graham Greene On the Frontier: Politics and Religion in the Novels. New York: Macmillan, 1988.

Hoskins, Robert. Graham Greene: An Approach to the Novels. New York: Garland Publishers, 1999.

Lodge, David. Graham Greene. New York: Columbia University Press, 1966.

Whitehouse, J.C. Vertical Man: The Human Being in the Catholic Novels of Graham Greene. New York: Garland Publishers, 1990.