Dead Man’s Mirror by Agatha Christie

When a wealthy man summons Hercule Poirot to help with a blackmail case, he ends up dead in what appears to be a suicide. But Poirot quickly suspects foul play and uncovers a tangle of family secrets, forged documents, and motives linked to inheritance. Using his sharp mind and attention to detail, he pieces together the clues behind the broken mirror and hidden gun. The story is a classic locked-room mystery full of twists. Poirot’s quiet brilliance shines in this suspenseful tale of deception and control.