E. V. Cunningham tackles a world-shaking theme in the manner of a slick romance in Phyllis…. Why is Sgt. Tom Clancy, N.Y.P.D. posing as an assistant professor of physics at Knickerbocker University? The answer, gradually revealed, is startling, and the ensuing action effective. There are the ingredients of a superior (if hardly credible) thriller here—if only so much of the dialogue did not seem to have escaped from a women's magazine or even from daytime television. (p. 22)

Anthony Boucher, "Criminals at Large," in The New York Times Book Review (© 1962 by The New York Times Company; reprinted by permission), March 4, 1962, pp. 20, 22.∗