NY: Simon & Schuster, 1950. First edition, first printing. Hardcover. Original dark gray boards, octavo, 240,  pp. Fine, entirely clean and unworn in very good pictorial jacket with moderate soiling to white rear panel. Fine / very good. Item #19500
Fourth title in Simon and Schuster's "Science Fiction Adventures" series. Van Vogt's novel is based on some earlier short stories about the "Space Beagle" and her travels.