The groundbreaking #1 New York Times bestselling study of Jack the Ripper-now in trade paperback. America's #1 bestselling crime writer solves the case that has baffled experts for more than a century. For over 100 years the Jack the Ripper murders have remained among the world's greatest unsolved crimes, and theories have been posited which point the finger at royalty, a barber, a doctor, a woman, and an artist. Using her formidable range of forensic and technical skills, bestselling author Patricia Cornwell has applied the rigorous discipline of twenty-first-century police investigation to the extant material, and here unmasks the killer.