When you know the book and then watch the film you might have the expression tzat filom is quite close to the book. But when you reread the book afterwards you realize some differences. The kidnapping of the toothfairy e. g. is slightly different. Then there are only three thugs in the film: Medium Dave, Banj0 and Chickenwire. The brother's names aren't Lilywhite but cropper. Minor parts are not in film like the king visiting the poor peasant. But you'd realize it doesn't really matter.