I am a freshmen taking calculus and physics and discrete mathematics and things like that. I was wondering if there are any sites devoted to reviews and comments on books for physics , calculus. And, I have two calculus books, Spivak and Apostol, I took calculus in high school and whatever they are teaching me now in college is a little addition to it. So what do you think, books like Spivak and apostol better suit me. I want to major in physics.