New York: Hearst, 1974. hardcover. Introduction by Isaac Asimov. Edited by Richard F. Dempewolff. Produced by The Editors of Science Digest. Illustrated. xii + 229pp., 8vo, cloth, d.w.; few minor spots of chipping to dust wrapper. New York: Hearst Books, (1974). A very good (+) copy in a very good dust wrapper. very good(+) / very good.