Read the book several years before the movie after seeing it on a shelf at the library. It was very good, with some extremely disturbing parts.
Want to know how little I knew about the book at the time? I thought it was a memoir, and went stuff kept happening that seemed far too fictional to be true, I said to my SWMBO, "This stuff couldn't have really happened." To which she said, "Of course it didn't. It's a work of fiction."
To which I replied, "D'OH!"