Best AP prep books???? (APES/APUSH)

I am currently taking APES & APUSH and I signed up to take the APUSH test and thinking about doing the APES test. I just looked at the practice tests for both and though many people say those are both easy tests, I feel like I know nothing on those tests based off what I’ve seen on the practice tests. What prep books would you guys recommend for these subjects??? Thank you!!!

Also, do schools frown upon you taking AP courses & not taking the exams? (I feel like it would just look like fluff to them, but I’m not sure.) The APUSH is paid for by my school but the APES isn’t since I take that class online, and the money for that test really isn’t in my family’s budget…

If you cannot pay APES, dont take APES. Book for APUSH: essential content or AMSCO. The latter is more extense, just if you have time for it.