What makes one AP prep book preferable to another?

<p>I recently purchased AP test prep books in anticipation of the exams in May, and of course neglected to check College Confidential for advice until after my trip to Barnes & Noble. Today, I discovered a thread with specific suggestions for review books. Can anyone offer insight as to what makes a certain company's review book preferable to another's?</p>

<p>For AP Euro, I purchased the Barrons guide (CC suggests Modern European History), for AP USH I chose PrincetonReview (instead of CC's Amsco), for Human Geography I have REA (instead of Barrons), and I believe that my Calc AB teacher bought us all Cliffs review books (instead of Arco). Does anyone have experience using any of these books? Should I return my purchases and look for the others instead? Since I am self-studying Human Geography, will the type of book significantly effect my score, or are time and dedication more important? </p>

<p>Any advice or insight would be very much appreciated! Thanks in advance.</p>

<p>For APUSH, I (like other CCers) maintain that AMSCO is a must.</p>

<p>Personally I listen to CC when I make these decisions.</p>

<p>Princeton Review worked very well for me for AP World and it has been working well of APUSH. It is simple yet very informative.</p>

<p>Thanks! As it turns out, my high school has a collection of Amsco books available to those of us in AP US II, so I will be able to use both that and PrincetonReview.</p>

<p>I am most concerned about the quality of REA’s Human Georgraphy since I do not have a classroom course to back up what I am teaching myself. Any further insight on that?</p>