Every Breath You Take

This book is about an obsessive sociopath who can only feel love when he physically harms someone. He then start catching interests for a girl who has no idea he exists. He is an undercover agent who has the ability to watch anyone, at any time. In his quest to get through to her, he must start observing the girl and follow her around to gain enough information about her. While doing so, he use some rather disturbing techniques to be able to get the girl for himself. This leads the victim through some difficult decisions and some heartbreaking moments. But will that stop the victim from finding a way out?