<p>Lol DH is an amazing book. Anything Krieger writes is amazing for Prep. I used Crash Course Euro, DH 2010/2011, and his new AP US book. All well worth it. </p>
<p>And there is more of a difference in DH 2011 vs. 2010 than there is when you compare PR AP euro 2010 and 2011 edition. My vocab is utter crap, and I got 19/19 in SC after DH + vocab from school.</p>