Megan Cross The Killer Of The Woods

This book is about a teen girl that is suppose to be "emotionless" and can only be killed by the one she can't see the felling?! Megan cross knowing she has the power to see peoples feelings meets a group of cold hearted people that wants only to still her powers always from her by drinking her blood. But still thinking about her aunts last words she tries to live like before. But how can u live a normal life knowing that your a failure and that you can make only one mistake and kill all your friend