<p>While I was in the process of buying AP prep books I couldn't help but notice the significant price differences between the 2013, 2012, and 2011 editions of books. Are there major differences between them? Or are they just the same book with a new cover (so they can squeeze more money out of us)?</p>
<p>Most of them are basically new covers and maybe a couple of edits. Only if you are taking AP biology or world history should you not purchase a 2011 book. (If you’re taking ap world, buy 2012 or above
Ap bio should be 2013 or above.)</p>
<p>What about European history?</p>
<p>An older ap euro prep book should be fine.</p>