Allen, L. David, "Isaac Asimov," in Science Fiction Writers, Charles Scribner's Sons, 1982, pp. 267-76.

Asimov, Isaac, "Introduction," in The Best of Isaac Asimov, Doubleday and Company, Inc., 1974, p. x.

----, "Preface to Nightfall," in Nightfall and Other Stories, Doubleday and Company, Inc., 1969, p. 1.

Pehowski, Marian, "Isaac Asimov," in Contemporary Novelists, St. James Press, 1991, pp. 49-56.

Rothstein, Mervyn, "Isaac Asimov, Whose Thoughts and Books Traveled the Universe, Is Dead at 72," in the New York Times, April 7, 1992.

Stanton, Michael, "Asimov, Isaac," in Reference Guide to American Literature, 3d ed., edited by Jim Kamp, St. James Press, 1994.