New York: Ace Books, Inc., 1956. First editions, first printings. Paperback. Item #41205
Ace Double, book number D-139, with 35¢ cover price. Cover art by Bernard Barton and Harry Barton. Light printing flaw at the bottom of the front cover. Small corner crease on the Atom Curtain cover. Light opening creases along the spine. A very good plus copy.