<p>hello. just wondering if there's really an significant changes between different "editions" of prep books that warrant you to buy the latest and greatest edition of a prep book? or do the old versions suffice as well?</p>
<p>depends when the test changed and how old the book is. human geo just changed so you need the 2010, comp gov changed recently as well. for other subjects, as long as its within 3 years its probably fine</p>
<p>Older versions are just fine for many of the exams. I bought a copy of The Princeton Review: Cracking the AP US Government and Politics exam from 2002-2003 for $0.25 from the library. It is almost exactly the same as the 2010 edition. Some of the format changes but all of the content stays the same for the most part.</p>
<p>I can’t help but wonder if the prep companies are annoyed about the apparent upcoming MC scoring changes for AP tests; I would have thought that the 2010-2011 books would have been printed by now.</p>
<p>Old editions of prep books are sufficiently cheaper. =p</p>
<p>Half.com has the old prep books for about $.75 each. With shipping, it’s just over $4 per book, and even less if you buy multiple books from the same seller. ;)</p>
<p>Most of the material is the same in older books so it is the better option to buy them used. Or even better, check them out from the library for free :D</p>