Campbell’s textbook is good for throughout the year, but I actually highly recommend using the Barron’s book for review or even as a supplement as you read through your textbook. At the very least, use the table of contents in Barron’s to guide you for what you need to know for sure for the AP test.
Bozeman science’s biology videos are also pretty good if you’re confused about something, and he makes sure to cover AP bio topics.