The Mysterious Mr Quin is a short story collection.
Each chapter or story involves a separate mystery that is solved through the interaction between the characters of Mr Satterthwaite, a socialite, and the eponymous Mr Quin who appears almost magically at the most opportune moments and disappears just as mysteriously. Satterthwaite is a small, observant man who is able to wrap up each mystery through the careful prodding and apposite questions of Quin, who serves as a catalyst each time the men meet.
Of the twelve stories, two are set on the French Riviera, ‘The Soul of the Croupier’ and ‘The Voice in the Dark’. A third is set in Corsica, ‘The World’s End’.