Do they sell the books seperatley from the core set?

I just got my book yesterday and its already falling apart >.<

I've heard that if you contact FFG directly they are really good about providing replacements with no fuss.

Here's the FFG Customer Service page with contact e-mail addresses:

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or http://www.fantasyflightgames.com/edge_npm_sec.asp?eidm=12&esem=3 (sorry, I can't yet post proper links)

Sounds like you want the Parts address.

Hope this helps.