NY: St. Martin's Press, 1984. Book club edition. Octavo (8.5 x 5.75 in.); 186pp.; black papered boards, in dust jacket. A fine copy in a very good (+) jacket with some light creasing and wear at the ends of the spine, which shows mild sun-fading. The final published novel in Butler's five-book Patternist series (though the third book chronologically).