5Agatha Christie's famous Belgian detective Hercule Poirot makes his debut in "The Mysterious Affair at Styles." The mystery of the novel is the one of who poisoned wealthy heiress Emily Inglethorp and how did the killer get in and out of her locked bedroom. The suspects are many and Poirot must use Holmesian deduction to discover the killer. Mystery fans will delight in the first installment of Agatha Christie's famous series of Poirot mystery novels.