Turn-of-the-century Paris was the beating heart of a rapidly changing world. But the City of Light was also a violent place. Criminals eagerly took advantage of the inventive nature of the age--the first getaway car, increasingly dangerous weapons, more creative disguises. The police battled back with a weapon of their own: Alphonse Bertillon, the world's greatest detective, the inventor of the mug shot and the crime-scene photo, and a...