Resources for AP Chemistry and AP Biology

I am a rising junior that might take AP Chemistry and AP Biology.
Can anyone recommend any books or online websites that are known for effectively preparing oneself for the AP exam/course?

I have about a summer to get familiarized with the AP course content before it actually starts for my junior year.

And yes, I might be taking both of these at the same time.

Thanks in advance!

Getting a review book would definitely be helpful. I recommend Princeton Review for AP Chemistry and Barron’s or CliffsNotes for AP Biology.

@azwu331 Thanks for your advice! Do you know (did you use) any other resources that helped to prepare for the AP exam?