“In the case of supersymmetry, we still don’t know whether it is realized in nature, but the idea has become popular. The reason is that many of the issues that plague conventional quantum field theories are eliminated when supersymmetry is introduced. Supersymmetric theories are generally more elegant and easier to analyze.”
Edward Frenkel, Love and Math: The Heart of Hidden Reality
This is an excellent book to think through the power of questions. Frenkel makes complex mathematical and physics problems clear and relatively easy to understand — there is no point in reading this or any book if you already have all the answers. Come prepared to think hard in order to learn, and through learning, to ask new questions.