Could I do really well on the SAT II's?

<p>Okay, I bought two books, one on the SAT subject test for us history and the other on biology e/m. Would I be able to get 700+ by just reading these two books? I take AP Biology at the current moment and I kinda suck at it but I am picking up some helpful things that would bode me well. I also am taking AP Government. Basically, I'm just curious if I could do substantially well on the subject tests with just self-studying from the books I got or does it take more than just the books? I'm not that good at AP Biology just so you know but I want to take the subject tests b/c some of the things I learn will be fresh in meh mind.</p>