Black Coffee

Sir Claud Amory, a famous physicist, invites Hercule Poirot to his country estate to protect a secret formula for a new explosive. When the lights go out and Sir Claud is found dead in his chair, Poirot must identify which family member or guest poisoned his coffee. This novelization of Agatha Christie's first play brings the classic detective and Captain Hastings to a secluded manor full of suspects.