next year, i’m planning to take ap calculus ab, ap language and comp, ap biology, and ap us history. what would be the best ap prep books for these subjects? im also planning on taking SAT subject tests for math level 2, us history, and biology. what would be the best books for these subject tests or can i use my ap prep books for them?

Plus im taking AP Bio and AP US History 2 next year. im a sophomire now. what can i expect in the classes? ans are the AP Bio and US History 2 exams difficult?
The tests are for different purposes, yes, but for example, I’ve heard that the AP Us History test has more "comprehensive" questions while the sat US history test has more date and battle based questions. Are there similar differences for the Chemistry ap and sat tests? Or more differences between the AP and Sat Us history tests?
What are the best tips and strategies for taking the SAT test? I’m taking it in 2 days…however, is it a good or bad idea to only study for it tomorrow? Because I just got done with 3 straight exams for this week, which is midterm week…AP US History, PreCalc, and Spanish 4. I’m trying not to bog my mind down too much, so should I ignore that and study now or wait until tomorrow and have fun for today (I’d study all day tomorrow).
Also,What are the best tips and strategies for taking the SAT test?