I have a question for those of you who may have seen books/resources on this before. I am just finishing calculus 2 this semester and will be continuing in math next year. What I would like to know is whether there are any books written for my mathematical level of knowledge that would allow me to explore deeper in to why things work. i.e. why do derivatives give velocity, acceleration, etc. Why do integrals work to approximate volume. Am I asking for something that I don't have the math level for, or is there something like this available?