Advice for AP prep books 07-08

<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>

<p>dont wait
the new edition will have either no or very little more content
generally they come with a new edition each year, but idk when
coudl be as late as january</p>