<p>Lol, the practice tests don’t change either. I had a PR Euro book labeled “2006-2007” and its tests were identical to the one in the “2010” edition. </p>
<p>The only time when you should consider getting the latest edition is when the AP exam changes. E.g. you might want to get a “2013” AP Bio book - the 2013 Bio test will be different (different content, different question types - 4 choice questions that are more conceptual). </p>
<p>SAT II haven’t changed in an eternity and there are currently no plans to change them either.</p>