"The Murder of Roger Ackroyd" by Agatha Christie is a detective novel published in 1926. When wealthy Roger Ackroyd is found stabbed in his study, the recently retired Hercule Poirot is called to investigate. The victim had recently learned the identity of a blackmailer from his fiancée, a widow who poisoned her husband. As Poirot unravels a complex web of secrets among the household guests and staff, the novel's narrator, local doctor James Sheppard, chronicles the investigation that leads to one of detective fiction's most controversial and groundbreaking conclusions.