<p>Can I use corresponding AP ones?</p>
<p>For most subjects it will give you a good review, but some subjects like US and World History the SAT Subject Test is more factual than the AP test.</p>
<p>So I should buy separate books?</p>
<p>It'd be a good idea to at least look over some of the SATII prep books, just so you can see how the material is approached, how the test is structured, etc.</p>