<p>I am in urgent need and these appear to be the cheapest books.</p>
<p>Cracking the AP Statistics Exam, 2006-2007 Edition
Cracking the AP Environmental Science Exam, 2006-2007 Edition
Barron's How to Prepare for the AP Human Geography Advanced Placement Examination 2003</p>
<p>Am I able to use those still? Or should I get the newer versions? Thanks!</p>
<p>Those should be a good review for the AP test. Review books rarely change from year to year. I have checked AP review books from 2004 and compared them to 2008 books and the words are the same and even the practice tests are the same. The only reason why a company would change the book is if the test has been restructured.</p>