Alexandre Dumas transforms the notorious case of the Marquise de Brinvilliers into a gripping tale of aristocratic corruption, poison, and betrayal. Behind her elegance and apparent devotion, the marquise hides a murderous will, even poisoning her father, M. d'Aubray, after he forgives her and trusts her completely. As suspicion deepens around vanished servants, troubling autopsy findings, and a web of secret messages, her desperate attempts to escape are undone by betrayal and the discovery of a damning confession. Questioned by de Palluau, she is forced to confront a record of crimes that includes arson, the poisoning of her father and brothers, an attempt on her sister's life, and other acts of depravity. Darkly dramatic and morally charged, the narrative probes the deadly underside of power, the masks of respectability, and the ruin wrought by greed, revenge, and hidden vice. This edition has been fully restored with modern typesetting, custom cover design.