In Agatha Christie's "The A.B.C. Murders," the iconic detective Hercule Poirot faces a chilling challenge when a serial killer begins committing murders in alphabetical order. The murderer taunts Poirot with letters signed with the initials "A.B.C." After the first victim, who is found in Andover, Poirot becomes intensely involved in the case, alongside his friend Captain Hastings and Chief Inspector Japp. As the killings continue, each crime scene features a clue linked to the next intended victim. Poirot's investigation reveals a complex web of deceit and cleverly crafted schemes, showcasing Christie's exceptional skill at plot development. Clues lead him to unexpected places and individuals, revealing intricate relationships between victims and potential suspects. The narrative explores themes of intelligence, justice, and the psychological motivations behind crime. It is a fascinating exploration of the cat-and-mouse game between Poirot and the killer, highlighting the detective's deductive reasoning and ability to see beyond the obvious. Ultimately, the novel unveils surprising twists that challenge preconceived notions, solidifying its status as a classic in the mystery genre.