For me, author Willow Rose signals a guaranteed entertaining thriller novel, and this is true with Girl Next Door. She seems to specialize in serial killer tales. Even though I know this in advance, each of her novels catches me unawares with a surprise ending. Again, that is true with this novel but with a twist that I did not like. It had nothing to do with the mystery. That was good. Rose jumped back and forth in time to show the development of a splintered mind that would result in a serial killer. To find out who the killer was and discover motivation was like peeling an onion. Each layer had surprises; the novel was good and typical Willow Rose.