New York: Ballantine Books, 1963. First Ballantine edition, first printing. Paperback. Item #44514
Authorized edition. Ballantine identification number F702. Number 2 in Ballantine's Mars series. Cover artist Bob Abbett. Cover price 50¢. See Zeuschner 184. Light toning. Small, light pressure crease at the corner of the rear cover. A near fine and bright, unread copy.