Have I ever read a book having a villain with similar capabilities? Yes. I can think of a movie years where a prison inmate is executed and has powers identical to the ones described in this book. And there is a TV series in production on right now that had a strange entity doing the same type of thing. Did I enjoy this book? I'm giving it 3 stars because of the action scenes with the family, scary stuff with the mirrors, and the interaction of Melody with the daughter. I thought the character of John was rather bland and dull. The ending was intense, but wondered how the evil villain(s) would be dispatched. The 'door' was a bit of a reach. I think Melody could have been used more at the end instead of just having her. . . Well, read the book and find out.