From Britain's foremost criminal psychologist and bestselling author, a companion volume to his award-winning autobiography, The Jigsaw Man. Paul Britton can " walk through the minds" of those who murder, rape, torture, extort and kidnap. That is why the police call on him to help with many high-profile criminal investigations and catch those responsible. How does he do it? In this unique and revealing book, he reveals the psychological and forensic foundations upon which he has based his expertise. It is a remarkable journey into the darkest recesses of the human mind. From top-security prisons and mental hospitals to ordinary outpatients' clinics, Britton introduces us to his clinical and forensic work over the past twenty years. During that time, he has interviewed, assessed and treated people with damaged or broken minds. Paul Britton shows that the answers are often found, not at the crime scene, but hidden away within someone's mind, or deep in their past. Here he reveals the process by which he unlocks and deciphers the truth.