This book will create a revolution in psychological diagnosis, the law & law enforcement. Endorsed by psychologists & law enforcement workers from the local to the federal level. Never before published letters & drawings by convicted serial killers. This book reveals the inner workings of the mind of serial killers. Find out why they've been so difficult to apprehend--until now. To order contact: Int'l. Info. Assocs. Inc. , Box 773, Morrisville, PA 19067; Phone# 215-493-9214.