AP Classroom is a good place to start with the videos. While they don’t go super in depth (imo) they can help you gauge your understanding. I used the Princeton Review to review for the exam last year and thought the book was good. Barron’s might go more in depth though. Both books also have practice exams and chapter specific quizzes. I think they are ~$20 each but your local library might have some. The Fiveable survival pack might also be beneficial. Finally, I suggest looking at official past MCQs and FRQs so you know exactly what the test will look like. Ik the exam date is getting closer, but I believe in you!
Collegeboard actually has some helpful review material. Assuming you are not self-studying for the exam but rather are taking the course through your school, you should have access to AP Classroom. Here, you can find videos for every topic and practice MCQs and FRQs for every unit. I also suggest looking at past FRQ questions for practice. Fiveable also has some good guides for free, but I suggest using them alongside more comprehensive material. Here is their AP Bio survival guide.
I'm not sure what edition it is, but I found a pdf of it (whatever version has an owl on the front). I'd recommend checking out Libgen.is or Pdfdrive.com to find it if mine isn't right :)
I have a google classroom, where I have posted many prep books, study notes, FRQs, MCQs will be coming soon, because I just opened it! Here is the link: https://classroom.google.com/c/MjQ2NjcxNDExNjc2?cjc=r4dewb2 and the code is: r4dewb2
I have a google classroom, where I have posted many prep books, study notes (FRQs, MCQs will be coming soon since i just opened it!) Here is the link: https://classroom.google.com/c/MjQ2NjcxNDExNjc2?cjc=r4dewb2 and the code is: r4dewb2
I self studied for AP bio completely because it was my 7th AP that year and I didn’t have a place for it anywhere in my school schedule. I just read the Campbell book (it’s a big ass book, I heard it was good for ap bio) and I did some practice tests. I got a 4 which isn’t the best but isn’t the worst considering I self studied it and took 6 more APs. My advice is to plan the time carefully because there’s a lot of material to cover. Solve a lot of practice tests. Campbell AP bio
When purchasing review books -- keep in mind that in 2013 the exam format changed so don't buy anything thats outdated and then in 2019 the CED was introduced so the amount of content was reduced and exam format changed again.. The most helpful resources is the 5 steps to a 5 or do all the questions on AP classroom. Don't buy anything outdated.