With unprecedented access to the world's most evil killers, Christopher spent years interviewing imprisoned criminals - including notorious serial killers - he discovered that the lack of remorse these people showed was in many ways even more terrifying than the crimes they had committed. In the course of these conversations, the author had the chance to interview his subjects' psychiatrists and, in doing so, uncovered a terrible truth: a monster can be hidden behind a friendly face. Some of these experts, he found, proved to have more in common with their patients than he would ever have expected. This book examines horrific crimes committed by some of the most remorseless and merciless people ever to have lived. If it reveals a mindset wholly alien to most people, it also, shockingly, demonstrates that some of the people who treat these psychopaths have their own demons. This chilling study of darkest of criminal minds will inevitably shift the reader's view of psychopaths, and in doing so, reveals that horror can be much closer to us than we think...