<p>The CollegeBoard one is the real test (old ones) so I’d say they will be helpful.</p>
<p>I tried out tons of prep books. In my opinion, McGraw-Hill was the worst while Barron’s and Kaplan were decent. Princeton Review, to me, was way too easy. I got 800 on the tests compared to 750~ on the other books. Maybe it’s because the questions are written better but try all of them out!</p>
<p>The crash course book I don’t know the company but I read that after practicing with the two tests in the CollegeBoard one and the words seemed to be verbatim for some of the things 
My only problem with that review book (really short read it in less than an hour) is its division into different categories. Personally, years and eras are the way to group things for memorizing historical things. Years!! Most important</p>