When everyone says AMSCO, what do they mean?

<p>I've noticed in many threads, people suggest AMSCO as a good source of review for people taking the US History Sat II. I know that AMSCO is some kind of publishing company, but specifically what book do you mean, because there are lots of US History books under AMSCO. Do you mean the "United States History: Preparing for the AP examination" one?</p>

<p>Exactly the one.</p>

<p>excellent, thanks</p>