NY: Ballantine Books, 1953. 7 x 4.25 in., 214pp. First paperback printing, issued simultaneously with the hardcover. Signed by Clarke in his customary blue ballpoint pen on the title page. Very good condition, with no serious structural issues, but with the following minor cosmetic imperfections (all visible in photos): light crease to front hinge, several soft creases to covers, wear and surface flaking along rear hinge. Textblock somewhat toned. Spine slightly scalloped with a couple of very light creases; binding remains strong and secure. A reasonably presentable copy of this first issue version of Clarke's fifth novel, one of the landmark works of modern science fiction. Covert art by Richard Powers.