Eighteen short mysteries trace Hercule Poirot through cases drawn from the days before his name became famous, most of them recounted by his friend Captain Hastings. The stories first appeared in periodicals between 1923 and 1935, and this volume gathers them late in Agatha Christie's career, in 1974. The puzzles are compact and varied: a fatal masquerade at a costumed Victory Ball, a cook who vanishes from a respectable household, a kidnapped child at a country house, a poisoning recalled from Poirot's days in the Belgian police, a theft of naval plans, and a death aboard a cruise ship. Each entry sets out its clues, lets Poirot apply his order, method, and observation of small inconsistencies, and closes with an explanation Hastings rarely anticipates. Several stories shift the lens, with Poirot recounting an old failure or working alongside Scotland Yard's Inspector Japp, while others step outside Hastings's narration entirely. The settings move between London flats, seaside resorts, trains, and remote estates, and the tone ranges from light social comedy to quiet menace. Together the pieces show the detective in his formative years, before the long novels, relying on logic and a reading of human nature rather than physical pursuit. The collection serves as a survey of Christie's early short fiction, returning to characters and a partnership that defined the start of the Poirot canon.