Elise- She's a cop who one day shoots a kid shooting up a shopping mall but he's the only casualty. The man she saves right before killing the gunman disappears from the mall. Weeks go by until she finds and follows him and he turns and attacks her. What made him do this?

I love this character Elise. She does really good work with cold cases. I was on the edge of my seat as she tried to uncover the mystery of this man. The lengths this man goes to to scare her is unreal and creepy. 

Wendy Walker is always a great thriller writer and this book just blew me away. It's a bit shorter than other thrillers but it still packs a punch.