New York: The Gnome Press, 1948. First edition. Hardcover. Fine / Fine. Original gray cloth lettered in red along the spine. In a fine example of the complete dust jacket. Signed by both authors on the front free endpaper. The signatures are actually preceded by a brief inscription "For Julius Unger" which appears to be in the hand of L. Sprague De Camp. Julius Unger, an original member of First Fandom was a very influential Science Fiction advocate, student and Dealer for thirty years. Significant provenance.