5In her first published mystery, Agatha Christie introduced readers to her Belgian detective, Hercule Poirot. When the wealthy mistress of Styles Court is murdered, Poirot is on hand to wade through the confusing clues and long list of suspects! A classic whodunit.This special edition is loaded with bonus content...reviews of the era, a filmography, and a complete bonus Agatha Christie novel, "The Secret Adversary.""The Mysterious Affair at Styles is a detective novel by British writer 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.Styles was Christie's first published novel. It introduced Hercule Poirot, Inspector (later, Chief Inspector) Japp, and Arthur Hastings.[3] 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."