What is the connection between the number 13 and Jack the Ripper? Why was the number 18 crucial in catching Acid Bath murderer John George Haigh? And what is so puzzling about the number 340 in the chilling case of the Zodiac killer? The answers to all these questions and many more are revealed in a unique, number-crunching history of the ultimate crime. James Moore's Murder by Numbers tells the story of murder through the centuries in an entirely new way … through the key digits involved. Each entry starts with a number and leads into a different aspect of murder, be it a fascinating angle to a case or revealing insights into murder methods, punishments and, of course, the chilling figures behind the most notorious killers from our past. From the grizzly death toll of the world's worst serial killer to your own odds of being murdered, this guide will appeal to the connoisseur of true crime and the casual reader alike.