Notes: "© 1951 by McCall Corporation and Robert A. Heinlein" "First published in Great Britain by Victor Gollancz Ltd., 1968" First printing as per copyright page ("First NEL Paperback Edition January 1971"). Artist not credited. Artwork depicted in Science Fiction Monthly Vol 1. No. 3 where it is credited to one "Ronald Ferns." Confirmed as not Bruce Pennington on his Facebook page. "2838" on front cover and spine. ISBN derived from SBN "45000651 4" on copyright page U.K 30p (6/-); Australia & New Zealand $1.00; Spain Pts 75 Note that Pennington is credited in Pennington: A Portrait of a Master Fantasy Artist. This might imply that this is a composite cover, composed of Pennington's planet and rocket, and Ferns' "starport".