REA Crash Course for SAT ii/AP exam

<p>I'm taking the SAT ii for us history and bio and was wondering if REA crash course will suffice for it if I don't have any prior knowledge on the subject? I really want to to get an 800 on the sat ii and a 5 on the ap exam. Please reply fast! This is urgent!!!</p>

<p>PLEASE HELP! It’s really urgent!</p>