Key Out of Time, Ace F-287

Published by Ace, 1964; no ISBN; Ace F-287; 189 pages; 4.2 x 6.4 inches; paperback. Cover art is by Edward Valigursky.

Copyright 2007-2021 by Mike Grimm; cover images are copyrighted by their respective owners, are used here for illustrative purposes only, and are scans of my copies.