New York: Ballantine Books, 1957. First Paperback Edition. Item #1457
First Printing, issued simultaneously with the hardcover version. Octavo; glossy, illustrated wrappers; yellow edge-staining; 148pp,  ads. Text edges lightly tanned, with a faint stress crease to upper left corner of rear panel and some pinpoint rubbing to extremities; still a sharp, Near Fine copy. The Hugo Award-winning author's first full-length science fiction novel not written in collaboration.