Andrews, Peter. New York Times Book Review (April 25,1982): 51. Andrews says that Slaves of Spiegel succeeds in making readers "laugh out loud," a difficult feat.

"D(aniel) M(anus) Pinkwater." In Contemporary Literary Criticism. Volume 35. Edited by Daniel G. Marowski, Roger Matuz, and Jane E. Neidhardt. Detroit: Gale Research, 1985, pp. 317-321. A gathering of snippets from reviews of Pinkwater's novels.

Pendergast, Tom. "Pinkwater, Daniel Manus." In Contemporary Authors: New Revision Series. Volume 38. Edited by James G. Lesniak and Susan M. Trosky. Detroit: Gale Research, 1993, pp. 335-338. A brief summary of Pinkwater's career.

Telgen, Diane. "Pinkwater, Daniel Manus." In Something about the Author. Volume 76. Detroit: Gale Research, 1994, pp. 177-181. An overview of Pinkwater's career with quotations from an interview of Pinkwater.