In Agatha Christie’s second Hercule Poirot mystery, “The Murder on the Links” (1923), a man has been found dead in a freshly dug grave adjacent to a golf course. Poirot and Captain Hastings arrive on the scene only to be met by a hostile local police detective who is unwilling to share information. But Poirot’s methodical investigation slowly and surely reveals the real killer amid a host of suspects and clues.