Don't turn around : a thriller

"The police call him Merkury. He's a killer who chooses his victims seemingly at random. He leaves no evidence behind, and no witnesses. Except for one. When Kate Summerlin was eleven years old, she climbed out her bedroom window on a spring night, looking for a taste of freedom in the small college town where she was living with her parents. But what she found as she wandered in the woods near her house was something else: the body of a beautifu...