The Black Widowers is a fictional men-only dining club created by Isaac Asimov for a series of sixty-six mystery stories that he started writing in 1971. Most of the stories were first published in Ellery Queen's Mystery Magazine, though a few first appeared in Fantasy & Science Fiction, Isaac Asimov's Science Fiction Magazine, and the various book collections into which the stories were eventually gathered. Asimov wrote "there are few stories I write that I enjoy as much as I enjoy my Black Widowers." Source: Wikipedia (en)