First edition of the final volume in Asimov's black widowers sequence, which collects ten of the best previously published stories, along with two new, uncollected additions. NY: Doubleday, 1990. Octavo (5.75 x 8.5 in.); 253pp.; tan papered boards with black cloth backing and gilt spine titles, in dust jacket. Fine in a fine, unclipped dust jacket with a touch of wear at top corner tips.