<p>@cjmnksa: Princeton is definitely not necessary, in my opinion, so you’re fine with just Barrons, Sparknotes and Kaplan (I detest Kaplan, but you can use it if it helps you understand concepts). I think a lot of people may not use Sparknotes as a main book because Princeton, Barrons and Kaplan are so popular as review books for standardized tests. However, it is a very good book/site and overall doesn’t really lack that much in information, from what I remember. And I do agree that Sparknotes is often extremely useful for explaining concepts. Of course, like I said, I still definitely recommend Barrons as the main book for studying.</p>
<p>@Schoolisfun: No problem. I spent quite a bit of time studying. I studied for around 2.5 months, sometimes an hour a day, sometimes several hours a day.</p>