SAT Prep Books vs. The Real Thing

<p>So, I've done all the practice tests in the Blue Book, and so now I'm using the PR 11 Practice Tests book. However, I've noticed that I'm getting SO MUCH more wrong on the CR in that book than in the Blue Book, which worries me. Is this normal or is it just me?</p>

<p>And in general, which SAT Prep books are easier, harder, or almost the same as the real SAT? Thanks!</p>

<p>I found the Blue Book is the closest to the real thing, and I hadn't even touched Princeton Review while preparing for the SATs, so my opinion is biased.</p>