Hercule Poirot's Christmas (1939)

On the night before Christmas, cruel, tyrannical, filthy rich Simeon Lee is found in his locked bedroom with his throat cut. Now Hercule Poirot must put his deductive powers to the test to solve one of his most chilling cases - and to prevent a clever killer from spilling more blood. Also published as Hercule Poirot's Christmas and Murder for Christmas