In the fall of 1888, all of London was held in the grip of unspeakable terror. An elusive madman calling himself Jack the Ripper was brutally butchering women in the slums of London’s East End. Police seemed powerless to stop the killer, who delighted in taunting them and whose crimes were clearly escalating in violence from victim to victim. And then the Ripper’s violent spree seemingly ended as abruptly as it had begun. He had struck out of nowhere and then vanished from the scene. Decades passed, then fifty years, then a hundred, and the Ripper’s bloody sexual crimes became anemic and impotent fodder for puzzles, mystery weekends, crime conventions, and so-called “Ripper Walks” that end with pints of ale in the pubs of Whitechapel. But to number-one New York Times bestselling novelist Patricia Cornwell, the Ripper murders are not cute little mysteries to be transformed into parlor games or movies but rather a series of terrible crimes that no one should get away with, even after death. Now Cornwell applies her trademark skills for meticulous research and scientific expertise to dig deeper into the Ripper case than any detective before her—and reveal the true identity of this fabled Victorian killer.