Hi, I'm very interesting about Theoretical physics, In fact, I want to learn about Particle physics for my desire to solve difficulty. But, when I tried to study the famous mathematical book, by afken, I recognized it very hard to study by myself. So, I want to know other book which is well combination of afken. These book should be used to refer some difficulty. Moreover, I was shocked that there is new mathematical physics book which stress very different field than other ordinary books. "A Course in Modern Mathematical Physics: Groups, Hilbert Space and Differential Geometry" Did you see that? I saw list of contents it have and it emphasiss other mathematic field, not Calculus. Is it good for student who is not famillar with theoretical physics? Is it necessary to know about other mathematic field when i attempt to understand what kind of structure of universe, particle, origin of our world ? Please answer my question.