Summary:<br>The presentation of the material is clear, concise, and in a "step by step" format - you rarely have to do any work to go from one equation to the next.  If you want to understand how group theory (symmetry) can lead to a description of elementary particles and their fundamental interactions, to symmetry breaking and particle masses, then this book is for you. All considered, it's a 5 star book.<br><br>The Good:<br>The physical book has a good, water resistant cover, good binding, with high quality polished paper.<br><br>Prerequisites seem to be two years of college calculus, some college physics, and an introduction to linear algebra (matrices).<br><br>This is not a text book. There are no end of chapter problems or detailed examples. The format is as if the author wrote up his class notes, and then filled in all the details and missing steps. Most of the book reads like one big worked example with all the steps included.<br><br>It's an excellent introduction to group theory (for non-mathematicians), particularly SU(2), and spinors.<br><br>The Less Than Good:<br>The introduction to index manipulations in Ch. 2 and the Appendix is too short to be of real use. For example, a better introduction to the difference between row and column vectors and how they transform in a metric space is needed. This diminishes the readability of the book for people who are less well versed.<br><br>Some symbols can be ambiguous, like using the number 1 to represent the identity matrix.<br><br>Constants, like c (the speed of light) and h (Plank's constant), are not shown. These are usually shown in undergraduate books.<br><br>The Index is 3x to 4x too small, making searches difficult.<br><br>There are many sentence structure and punctuation imperfections. While this is noticeable, the meaning is almost always clear. I only had to decipher the meaning of two sentences in the book.<br><br>The Bad:<br>The presentation of SU(3) is not even a good summary, so if you need a good introduction to SU(3), look elsewhere.