Kaufman, U. Milo. "The Pilgrim's Progress" and Traditions in Puritan Meditation. New Haven: Yale University Press, 1966. Kaufman presents an important full-length discussion of Bunyan's masterpiece.

Kelman, John. The Road: A Study of Paul Bunyan's "Pilgrim's Progress." 1912.

Reprint. Port Washington: Kennikat Press, 1970. This work is based on lecture notes. Kelman gives a detailed commentary on particular passages and episodes as they occur in sequence. It is best used in conjunction with a close reading of The Pilgrim's Progress.

MacNeice, Louis. Varieties of Parable.

Cambridge: Cambridge University Press, 1965. The chapter on Spenser and Bunyan provides an excellent introduction to The Pilgrim's Progress.

Newey, Vincent, ed. "The Pilgrim's Progress": Critical and Historical Views. Totowa, NJ: Barnes and Noble, 1980. This collection of original essays is intended to rectify the neglect of The Pilgrim's Progress by modern critics.

Sadler, Lynn Veach. John Bunyan. Boston: Twayne, 1979. This work provides an overview...