Late one night, the residents of Styles wake to find Emily Inglethorp dying of what proves to be strychnine poisoning. Hastings, a houseguest, enlists the help of his friend Hercule Poirot, who is staying in the nearby village, Styles St Mary. Poirot pieces together events surrounding the murder. On the day she was killed, Mrs Inglethorp was overheard arguing with someone, most likely either her husband, Alfred, or her stepson, John. Afterwards, she seemed quite distressed and, apparently, made a new will - which no one can find. She ate little at dinner and retired early to her room with her...

The Mysterious Affair at Styles is a detective novel by Agatha Christie. It was written in the middle of the First World War, in 1916, and first published 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. The US edition retailed at $2.00 and the UK edition at seven shillings and sixpence (7/6). Styles was Christie's first published novel. It introduced Hercule Poirot, Inspector (later, Chief Inspector) Japp, and Arthur Hastings. Poirot, a Belgian refugee of the Great War, is settling in England near the...

The Secret Adversary is the second published detective fiction novel by Agatha Christie, first published in January 1922 in the United Kingdom by The Bodley Head and in the United States by Dodd, Mead and Company later in that same year. The UK edition retailed at seven shillings and sixpence and the US edition at $1.75. The book introduces the characters of Tommy and Tuppence who feature in three other Christie novels and one collection of short stories; the five Tommy and Tuppence books span Agatha Christie's writing career. The Great War is over, and jobs are scarce. Tommy Beresford and...