Princeton Review vs Crash Course

So I bought two books, both for APWH, but I am wondering which one would I better be off with to learn and study and review/prep for the AP Exam in May, 2013. I got the “Cracking the AP Exam, 2013 Edition” and “AP World History Crash Course” book. I want to pick one to study with, and return or sell the other one.</p>

<p>Should I like keep both books?? ^^ I really want to return one, so I can save money D:</p>