Do you ever have that feeling you're being watched? Perhaps you are... Leading criminologist Christopher Berry-Dee turns his unflinching gaze on maybe the most sinister and disturbing of all killers - those who first stalk their unwitting victims, often for months at a time. By an expert with over twenty-five years' experience interviewing more than thirty of the most dangerous male and female serial killers of contemporary times, this latest book from the bestselling author explores the darkest corners of these thrill-killers' minds.