The Big Four* follows Hercule Poirot as he confronts a secret international crime syndicate composed of four powerful masterminds. Drawn into a web of espionage, political intrigue, and deceit, Poirot teams up with Captain Hastings to expose their global conspiracy. The novel blends mystery with thriller elements, showcasing Poirot’s analytical brilliance as he unravels complex clues and faces a formidable, shadowy enemy, threatening their plans with his wit.