New York: Ballantine Books, . First Edition. 12mo (18cm.); publisher's white pictorial card wrappers; 160pp. Wrappers rather worn with shallow pealing at spine ends, old ink price to upper cover, ownership signature inside upper cover. A Good or better copy. Signed by the author on title page. First edition of this science fiction novel, an expanded version of the 1952 short story published in "Startling Stories."