This is an interesting read, and it does move quickly. The idea of getting into the head of a psychopathic killer was probably even more unique when the novel was first published in the 1950s. The one issue is that, because the reader is in the head of a killer, as the killer unravels, the story becomes less and less coherent, which left me with some confusion and a little less than fully satisfying ending. It would have been nice if there were some sort of afterword to tie up just a few lose ends.