Cleveland, OH, World Publishing Company, 1960. First Edition. First Impression. Hardback. A very good copy. Signed by the author without inscription to the title page. The first in the forerunner books. 25mm tear to the top of the jacket, some chipping to the spine tips, a little wear to the fore corners. Some bumping to the spine tips. Cover art by Ed Emshwiller [7978, Hyraxia Books].