Subject review guide(s) to use in conjunction with classes

Hey All!

Asking for recommendations for subject review guides that I can use in conjunction with my science classes. I am not planning on studying for the MCAt yet but would like to have the guide to help me prioritize the important information with in the class. I am planning on taking the MCAT in 2023.

I am looking at the Kaplan 7 subject set (but it is a hefty price right for not taking the MCAT within the next year) Would this be a good choice given that I would only be using it as a guide for now?

Are the princeton review books any good?

Thanks in advance for your help and advice