"Beagle, Peter S." In Contemporary Authors: New Revision Series, vol. 4. Detroit: Gale, 1981, pp. 49-54. This entry lists Beagle's publications and includes an interview with Beagle.

Michalson, Karen. "Peter S. Beagle." In Beacham's Encyclopedia of Popular Fiction, vol. 1 (Biography and Resources). Edited by Kirk H. Beetz. Osprey, FL: Beacham Publishing, 1996, pp. 111-113. Michalson summarizes Beagle's life and popular reception and provides an annotated listing of works about him.

"Peter S. Beagle." In Dictionary of Literary Biography: 1980 Yearbook. Detroit: Gale, 1981, pp. 134-142. This article summarizes Beagle's life and the role writing has played in it.

Zahorski, Kenneth J. Peter Beagle. Mercer Island, WA: Starmont House, 1988. This is an introduction to Beagle's life and work, including close readings of A Fine and Private Place, The Last Unicorn, and The Folk of the Air.