Books in the Natalie Porter Series series

Things that go bump in the night are real.I'm Natalie Porter, and I have spent my entire life with the dead. I have always seen and helped the dead find their lasting peace...until now. Now, I'm watching the innocent die. I don't know how to stop him, and I'm not sure I can.The killer communicates with me. He haunts me with his deep, evil laugh, enjoying the torture he inflicts as he's preying on the innocent. He is trying to find the perfect way to make me suffer.I don't understand why he hates me or what I did to him. I know I have to find him, to stop him before more people die or I do. No one can help me; this is my destiny to face him. He wants me to die. I want him to look me in the eye and try to kill me. I want to see the face of the monster who inflicts such pain.I'm waiting for him to come. I have to face him alone. I'm drawing on all my abilities to be ready to fight. I know one of us will die. I pray that it's him, and I have the strength to survive.