The Mysterious Affair at Styles is a detective novel by Agatha Christie. In her first published mystery, Agatha Christie introduces readers to the heroic detective, Hercule Poirot. This is a classic murder mystery set in the outskirts of Essex. The victim is the wealthy mistress of Styles Court. The list of suspects is long and includes her gold-digging new spouse and stepsons, her doctor, and her hired companion. Poirot, a Belgian refugee of the Great War, is settling in England near the home of Emily Inglethorp, who helped him to his new life. His friend Hastings arrives as a guest at her home. When the woman is killed, Poirot uses his detective skills to solve the mystery.