<p>how hard is the AP world history and which review book(Priinceton Review, Barrons's, or Kaplan) is the best to study for this test?</p>
<p>It's easy.</p>
<p>After taking AP US History, AP World History seems like a kid's class. I would go Barrons as far as review books go. I didn't care for PR very much because it's written like a story instead of just facts.</p>