THE MONITORS. [New York]: A Berkley Medallion Book published by Berkley Publishing Corporation, . Small octavo, pictorial wrappers. First edition. Berkley Medallion X1340. Invasion of Earth by all powerful aliens -- but they're very polite! Naturally, there's a rebel (Ace Blondel) who doesn't want to go along with the new arrangement. Sargent, British and American Utopian Literature, 1516-1985, p. 300. Reginald 08672. A fine, unread copy. Cover art by Richard Powers. (#144022).
"BERKLEY MEDALLION EDITION, December, 1966" on copyright page.