

She ate little at dinner and retired early to her room with her document case. Afterwards, she seemed quite distressed and, apparently, made a new will - which no one can find. On the day she was killed, Emily Inglethorp was overheard arguing with someone, most likely her husband, Alfred, or her stepson, John. Poirot pieces together events surrounding the murder. Lieutenant Hastings, a houseguest, enlists the help of his friend Hercule Poirot, who is staying in the nearby village, Styles St. Late one night, the residents of Styles wake to find Emily Inglethorp dying of what proves to be strychnine poisoning. The income left to Mrs Inglethorp by her late husband would be distributed as per Mrs. John Cavendish is the vested remainderman of Styles that is, the property will pass to him automatically upon his stepmother's decease, as per his late father's will. Emily's two stepsons, John and Lawrence Cavendish, as well as John's wife Mary and several other people, also live at Styles. Inglethorp upon her recent remarriage to a much younger man, Alfred Inglethorp.

Upon her husband's death, the wealthy widow, Emily Cavendish, inherited a life estate in Styles as well as the outright inheritance of the larger part of the late Mr. The novel is set in England during World War I at Styles Court, an Essex country manor (also the setting of Curtain, Poirot's last case). The book includes maps of the house, the murder scene, and a drawing of a fragment of a will, as well as a number of red herrings and surprise plot twists. There are a half-dozen suspects, most of whom are hiding facts about themselves. It is set in a large, isolated country manor. The story is told in first person by Hastings and features many of the elements that have become icons of the Golden Age of Detective Fiction, largely due to Christie's influence.

Styles was Christie's first published novel, introducing Hercule Poirot, Inspector (later, Chief Inspector) Japp, and Lieutenant Hastings (later, Captain). edition retailed at US $2.00 and the UK edition at seven shillings and sixpence (7/6). It was then published in book form by John Lane in the United States in October 1920 and in the United Kingdom by The Bodley Head (John Lane's UK company) on 21 January 1921. After being rejected by some six publishers, it was finally accepted by John Lane who had it serialised in the Times Weekly Edition in February 1920. The Mysterious Affair at Styles is a detective novel written by Agatha Christie in 1916 during the time she was serving as a VAD dispenser at the Torbay Infirmary and Dispensary. Dustjacket illustration of the first edition in both the US and the UK
