KORSGAARD PUBLISHING has republished Dr. Karl Bergs timeless classic, THE SADIST. After his arrest, Peter K rten, the D sseldorf Vampire, allowed Dr. Berg to dive into his mind. The result was this book. Never before has a serial killer spoken so openly and candidly about his murders, fantasies, and motivations. This book is a must read, but only for those who dare traverse the journey of the darkest of human behaviors.