Best Bio, US History SAT II review books?

<p>I've heard, many times, that the best SAT II biology review book is the Cliff Notes AP book. And that the Princeton Review World History book is terrific.</p>

<p>Some say that the Kaplan Bio SAT II book has too many facts,
while the Princeton Review Bio has too few ... Yes?</p>

<p>If my question has been raised many times over -- I'm sorry! </p>

<p>Many thanks.</p>

<p>Bio - Kaplan
US - PR</p>