Anderson, Poul. "How to Build a Planet." In Turning Points: Essays on the Art of Science Fiction. Edited by Damon Knight. New York: Harper and row, 1977. Anderson explains how to create believable planets for science fiction.

——. "Science Fiction and History."

In Amazing Stories, 63 (January 1989), 43-49. Anderson here discusses how the past may be used to suggest possible futures.

"Anderson, Poul." In Contemporary Authors. Volume 34. Edited by James G. Lesniak. Detroit: Gale Research, 1991, pp. 17-21. Lists Anderson's writings and awards, with a summary of critical opinion about Anderson's work.

Beetz, Kirk H. "Poul Anderson." In Beacham's Encyclopedia of Popular Fiction. Ed. Kirk H. Beetz. Osprey, FL: Beacham Publishing, 1996, Vol.

1, Biography and Resources, pp. 4346. Summarizes Anderson's career and critical reception. Elsewhere in the encyclopedia are analyses of individual works by Anderson.

Miesel, Sandra. Against Time's Arrow: The High Crusade of Poul Anderson.

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