you have NO idea :P, the whole movie was basically the first 1/3 of the first book, but mangled to make it more cinematic
. There second film was... wrong, on every level and bears no resemblances whatsoever to anything in the books, then as the second movie bombed so hard, they didn't bother making the third. I only got about 1/2 way through the second film before I had to stop, it was just wrong. He actually makes a joke about the movies in the third book, but I wont say any more, spoilers
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I'm 1/2 way through the 5th book now and it's EPIC, a must read.