Notes: • ©1952, 1953 No other statement of publication or printing • Date of printing from copyright page of the third printing • The artist is credited on the copyright page, no visible signature. • OCLC lists the hardcover but not the '53 paperback. • This marks the first SF novel published by Ballantine, only preceded by the first Star SF anthology as this publisher's first SF book. There is a very interesting editorial on page [5] Time for a Change: A Statement on Science Fiction 'signed' simply "Ballantine Books, Inc." that may be unique to this publication.