What genre, usually involving a mysterious death, is exhibited by a book who features detective Sir Henry Merrivale?
Night at the Mocking Widow: Night at the Mocking Widow is a mystery novel by the American writer John Dickson Carr (1906–1977), who published it under the name of Carter Dickson . Mystery fiction: Mystery fiction is a genre of fiction usually involving a mysterious death or a crime to be solved.
Mystery fiction