Hello guys. Im fortunate that I have found this website and I have created an account just to ask one question. I asked this on yahoo answers as well but no luck. So here goes. I'm 14 years old and I love astrophysics. I have learn most of the basic stuff and I've also read A brief history of time by Stephen hawking. My next birthday is coming in a few months and I can get what ever I want. I really want a textbook which covers nearly everything about astrophysics and Quantum mechanics, relativity and string theory, super symmetry ,etc. I'm not worried about the price or the number of pages (actually more is better), as long as it is thorough and doesn't include super basic stuff. Thanks in advance! Oh, and I know basic calculus like differentiating and integrating basic equation. I am more than willing to learn more if a book requires a much greater understanding of calculus.