Black Coffee

Sir Claud Amory's groundbreaking explosive formula is stolen, and during a tense gathering, he is found dead after the lights go out, with the formula missing. Hercule Poirot, along with Captain Hastings and Inspector Japp, investigates a complex web of motives involving family disputes, past relationships, and suspicious outsiders. The story is a classic whodunit that combines intrigue, suspense, and a race against time to prevent disaster.