How to prepare for AP Chemistry?

Hi! I’m taking it as a senior and I want to brush up on some basic concepts before the year begins. I took AP Bio last year and got a B, so I’m a bit worried about AP Chem for next year.

I have taken 3 years of Chem in my home country (rigorous course load, not in English though), but not H.Chem in the US. What are the best books/sources to prepare? Will PR or 5 steps to a 5 make sense if I haven’t taken the class yet? Would Khan Academy be adequate? Thanks!