How to study AMSCO textbook for SAT US History exactly?

Hi! I’m taking the SAT US History again (took it this november) in december and I want at least over 700. I haven’t taken the AP course but I’ve taken US History classes in the past but the teacher wasn’t that great. I have the AMSCO book but nothing much else. How should I study AMSCO? Just read it over, or take notes, or highlight, or what? It’s really tedious to take notes and I don’t have much time… Would reading it over once or twice be sufficient?