Lots of films of books don't come up to scratch. The worst example I know is the 1939 version of Emily Bronte's dark brooding and wonderful classic "Wuthering Heights". Revered because of Olivier's presence, an over-rated actor if ever there was, it nevertheless ignores a whole generation of Earnshaws while putting in scenes you just will not find in the novel, e.g. Cathy dying in Heathcliff's arms with no mention of her being pregnant when in fact she dies giving birth to the second Cathy and Heathcliff is actually absent from the story at that point. Emily Bronte must turn in her grave every time it gets shown. Indeed, there has never been a decent version but this one is the worst despite the four star rating critics give it who, I suspect, have never read the book.