Any good SAT II Books?

<p>Is it recommended to study for the SAT II with a book as it is for the SAT and the AP tests? If so, are there any good books for the following subject tests:</p>

<p>Math Level 2
Biology
US History
World History</p>

<p>I think I'll be taking the SAT II next spring as a sophomore. I'll definitely be taking the math and biology tests, but for history I'll only be taking one of the two.</p>

<p>baron’s definitely</p>

<p>Princeton Review, also, get the College board ones.</p>