Marc Piskic Book order (chronological)

The daughter of an American millionaire dies on a train en route for Nice...

"For God's sake, come!" Unfortunately, by the time Hercule Poirot received Monsieur Renauld's urgent plea, the millionaire was already dead, stabbed in the back, lying in a freshly dug grave on the golf course of his adjoining Merlinville estate. There's no lack of suspects: his wife, whose dagger served as the weapon; his embittered son, who would have killed for independence; and his mistress, who refused to be ignored; and each felt deserving of the dead man's fortune. The police think they've found the culprit. Poirot has his doubts. A second murder proves him right.