<p>I am using this summer to study for the PSAT/SAT in Oct and December. I was looking on amazon.com and some of the books like Princeton Review and Grubler's have new 2012 books on preorder. I was wondering should I just buy the 2011 books since I'm taking it in December 2011 or should I wait until the new books are released in june/july?</p>
<p>And how often is the BB rereleased?</p>