A Handful of Darkness

No book-club edition is documented for the Rich & Cowan first. The tells that matter are internal to the edition: the 1957 Rich & Cowan second printing; the later orange-boards/black-lettering/griffin binding in place of the first blue-boards/silver/rocket binding; and the later jacket listing World of Chance on the rear panel. The Gregg Press (US) 1978 hardcover is a later reprint and the first American appearance, not a first edition.