The A.B.C. Murders

The A.B.C. Murders is a work of detective fiction by British writer Agatha Christie, featuring her characters Hercule Poirot, Arthur Hastings and Chief Inspector Japp, as they contend with a series of killings by a mysterious murderer known only as "A.B.C.". The book was first published in the UK by the Collins Crime Club on 6 January 1936, sold for seven shillings and sixpence (7/6) while a US edition, published by Dodd, Mead and Company on 14 February of the same year, was priced $2.00.

The form of the novel is unusual, combining first-person narrative and third-person narrative. This approach was previously used by Agatha Christie in The Man in the Brown Suit. In The A.B.C. Murders the third-person narrative is supposedly reconstructed by the first-person narrator of the story, Arthur Hastings.