"The Big Four", another detective story by Agatha Christie, was first published in 1927 in Great Britain. The plot of the novel revolves around the famous Belgian detective Hercule Poirot and his old friend Captain Hastings. The novel differs in its structure from other novels featuring Poirot, as it is a series of interconnected stories in which Poirot, with the help of Hastings, tries to solve the mystery of the Big Four, an international criminal group whose members are determined to eliminate Poirot.
