Twelve Cunningly Fashioned Detective Stories Once a month the Black Widowers club meets to enjoy good food, fine wine, convivial company - and to entertain a guest. Each month the guest provides them with a conundrum - a mystery which has so far proved completely baffling. And so the Black Widowers set to work on the problem - aided and abetted by Henry, their perspicacious waiter, whose powers of deduction never fail to astonish... Ingenious... Take one before sleep - The Guardian