Puzzles of the Black Widowers is a collection of mystery short stories by science fiction author Isaac Asimov featuring his fictional club of mystery solvers, the Black Widowers. It was first published in hardcover by Doubleday in 1990, and in paperback by Bantam Books in 1991.
This book is the fifth of the six books featuring the Black Widowers. It collects twelve stories by Asimov, most reprinted from mystery magazines and a few previously unpublished, together with a general introduction and an afterword following each story by the author. Each story involves the club members' knowledge of trivia.