<p>I will be taking AP Macro and I'm thinking about buying Barron's</p>
<p>I will also be taking AP US Govt and buying Princeton Review</p>
<p>my question is should i buy the prep books now? they all seem to be for the may 2007 ap tests.</p>
<p>do all prep books come out with a new edition each year? if they do i plan on waiting until they release the new editon. thanks</p>