The Murder of Roger Ackroyd by Agatha Christie A Hercule Poirot Mystery

Poirot retires to a village near the home of a friend, Roger Ackroyd, to pursue a project to perfect vegetable marrows. Soon after, Ackroyd is murdered and Poirot must come out of retirement to solve the case.

The book's narrator, Dr James Sheppard, introduces himself and explains these are his memoirs of a murder which happened in his town. In King's Abbot, wealthy widow Mrs Ferrars unexpectedly commits suicide, distressing her fiancé the widower Roger Ackroyd. At dinner that evening in Ackroyd's home of Fernly Park, his guests include his sister-in-law Mrs Cecil Ackroyd and her daughter Flora, big-game hunter Major Blunt, Ackroyd's personal secretary Geoffrey Raymond, and Dr James Sheppard, whom Ackroyd invited earlier that day. During dinner, Flora announces her engagement to Ackroyd's stepson, Ralph Paton. After dinner, Ackroyd reveals to Sheppard in his study that Mrs Ferrars had confided in him that she was being blackmailed over the murder of her husband. He then asks Sheppard to leave, wishing to read a letter from Mrs Ferrars that arrives in the post, containing her suicide note. Once home, Sheppard receives a call and leaves for Fernly Park again, after informing his sister that Parker, Ackroyd's butler, has found Ackroyd murdered. But when Sheppard arrives at Fernly Park, Parker denies making such a call; yet he, Sheppard, Raymond and Blunt find Ackroyd dead in his study, stabbed to death with a weapon from his collection.

Hercule Poirot, living in the village, comes out of retirement at Flora's request. She does not believe Paton killed Ackroyd, despite him disappearing and police finding his footprints on the study's window. Poirot learns a few important facts on the case: all in the household, except parlourmaid Ursula Bourne, have alibis for the murder; while Raymond and Blunt heard Ackroyd talking to someone after Sheppard left, Flora was the last to see him that evening; Sheppard met a stranger on his way home, at Fernly Park's gates; Ackroyd met a representative of a dictaphone company a few days earlier; Parker recalls seeing a chair that had been in an odd position in the study when the body was found, that has since returned to its original position; the letter from Mrs Ferrars has disappeared since the murder. Poirot asks Sheppard for the exact time he met his stranger. He later finds a goose quill and a scrap of starched cambric in the summer house, and a ring with the inscription "From R" in the backyard.