SAT II US History - who should take it?

<p>I'm an incoming senior and I only took math/sciencey SAT II's! I was going to take the US history as well beginning of senior year, but at that time our school only begins to teach us history. Do you think that reading the book is enough, or do you physically need to have taken the class to do well on it (by well, 750 or above)</p>