Captain Arthur Hastings, invalided in the Great War, is recuperating as a guest of John Cavendish at Styles Court, the ‘country-place’ of John’s autocratic old aunt, Emily Inglethorpe—she of a sizeable fortune, and so recently remarried to a man twenty years her junior. When Emily’s sudden heart attack is found to be attributable to strychnine, Hastings recruits an old friend, now retired, to aid in the local investigation. With impeccable timing, Hercule Poirot, the renowned Belgian detective, makes his dramatic entrance into the pages of crime literature.

Of note: Written in 1916, The Mysterious Affair at Styles was Agatha Christie’s first published work. Six houses rejected the novel before it was finally published—after puzzling over it for eighteen months before deciding to go ahead—by The Bodley Head.

• Times Literary Supplement: ‘Almost too ingenious…very clearly and brightly told.’

2. The Murder on the Links (1923)

“For God’s sake, come!” But by the time Hercule Poirot can respond to Monsieur Renauld’s plea, the millionaire is already dead—stabbed in the back, and lying in a freshly dug grave on the golf course adjoining his estate. There is no lack of suspects: his wife, whose dagger did the deed; his embittered son; Renauld’s mistress—and each feels deserving of the dead man’s fortune. The police think they’ve found the culprit. Poirot has his doubts. And the discovery of a second, identically murdered corpse complicates matters considerably. (However, on a bright note, Captain Arthur Hastings does meet his future wife.)

• The New York Times: ‘A remarkably good detective story…warmly recommended.’
• Literary Review: ‘Really clever.’
• Sketch: ‘Agatha Christie never lets you down.’

3. Poirot Investigates (1924)

A movie star, a diamond; a murderous ‘suicide’; a pharaoh’s curse upon his tomb; a prime minister abducted…What links these fascinating cases? The brilliant deductive powers of Hercule Poirot in…‘The Adventure of the Western Star’; ‘The Tragedy at Marsdon Manor’; ‘The Adventure of the Cheap Flat’; ‘The Mystery of the Hunter’s Lodge’; ‘The Million Dollar Bond Robbery’; ‘The Adventure of the Egyptian Tomb’; ‘The Jewel Robbery at the Grand Metropolitan’; ‘The Kidnapped Prime Minister’; ‘The Disappearance of Mr. Davenheim’; ‘The Adventure of the Italian Nobleman’; ‘The Case of the Missing Will.’

Of note: The stories collected here were first published in Sketch, beginning on March 7, 1923. Sketch also featured the first illustration of the foppish, egg-headed, elaborately moustachioed Belgian detective.

• Literary Review: ‘A capital collection…ingeniously constructed and told with an engaging lightness of style.’
• Irish Times: ‘In straight detective fiction there is still no one to touch [Christie].’

4. The Murder of Roger Ackroyd (1926)