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.

As all law-enforcement authorities, including the FBI's elite Behavioral Science Unit, will confirm, the majority of sexual psychopaths gain most of their perverse thrills from the stalking of their unsuspecting victims, often in so many different ways.

For them, the actual kill is frequently something less, after which the dead body is treated like so much garbage and simply abandoned or thrown away. Yet as these cases show, a victim has often been unwittingly followed, watched, or even visited before they are attacked, sometimes for weeks or even months.

Having exhaustively studied the case histories of more than sixty modern-day sexually motivated serial murderers - some still alive, others subsequently executed - the author zeros in on the Internet porn industry as one of the main motivating drivers in cultivating fantasy stalking, which can lead to rape, multiple rapes, and homicide graduating to serial murder. Even more chillingly, anyone who is active on social media is a potential stalker's victim.