<p>I want to get my review books before school starts to use as a supplement to the class, but could use some advice. What brand should I use? I've heard Barron's and Princeton Review are good. My AP's next year are calc ab, bio, world history and US gov. Any suggestions or opinions?</p>
<p>I took Ap World History this past year and I used Princeton review. It’s great at explaining things on an “easy-to-understand” basis. Also, it does a great job at comparing different concepts at the end of each section for better understanding of the material for the essays. Bottom line, Princeton was a yes for me. </p>
<p><strong>TIP</strong> I’m not sure if they change it every year, but I got the 2013 edition. Regardless of the date, though, I’m positive it will be huge. Therefore, start studying it as early as possible. I recommend, as soon as you get it, start studying it. Never cram… not good.</p>