Some people say the movie was better, some people say the book was better. I'd say in terms of quality, they're about equal. The book is a bit different (for example Norman being a fat sweaty nervous guy and not a tall, thin, nervous guy). There is a little less about Mary in the novel, but I think there is more about Sam and Mary's sister. Unfortunately, as I was born long after Psycho become engrained in our culture, the end didn't surprise me, or really even disturb me, though I liked the way it was presented in the book more than the movie. It's a good, quick read if that's what your looking for, but I admit that watching the movie gives you the same disturbed feeling.