New York, Gnome Press, 1953. First edition, first impression. Hardback. A fine copy. First hardback edition, published earlier in Startling Stories in 1948 (making it Clarke's first novel). Subsequently expanded and published as The City and the Stars. A little bumping to the spine tips at the boards, owner's name and a small ink mark (both to the endpapers). Cover art by Frank Kelly Frease [11054, Hyraxia Books].