Because there are so many details and so much information in the last book that it would be too confusing if you made it into a 2 hour movie. But yay! Again!
Hooray that's GREAT! But why didn't they divide the 5th book? That's the longest one.
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Environmentalist & Pescetarian
Thanks to everyone who voted me Best Storyteller and Most Likely to Take Over the World. You guys rock!