Bernardo, Anthony. "Larry Niven." Beacham's Encyclopedia of Popular Fiction: Biography Series. Volume 2. Ed. Kirk H. Beetz. Osprey, FL: Beacham Publishing, 1996, pp. 1355-58. Bernardo presents an account of Niven's life and career, as well as primary and secondary bibliographies.

Clute, John. "Niven, Larry." The Encyclopedia of Science Fiction. Ed. John Clute and Peter Nicholls, et al. New York: St. Martin's Griffin, 1993, pp. 873-75. Discusses 168 The Hole Man Niven as an important exponent of hard science fiction.

Easton, Tom. Analog Science Fiction-Science Fact 111, 1-2 (January 1991): 308. Easton finds N-Space, in which "The Hole Man" appears, to be an inconsistent collection.

Hartmann, William K. "A What-If World Comes to Life in Los Angeles."Smithsonian 12 (March 1982): 86-94. Niven, artists, and scientists jointly create an imaginary but scientifically possible world.

Of interest for its insights into Niven's creative methods.

Jonas, Gerald. New York Times Book Review October 26, 1975: 49. After suggesting that...