If you are interested in books about the modern theory of quantum physics (e.g. quantum field theories) that are accessible for anyone with a STEM degree, this is the book for you! The premise of the book is that all of derivable physics is governed by the principal of symmetry. Why the physical world exist they way it does (e.g. fundamental constants, the occurrence of triples in theories and results) is not discussed because as of now it has no derivable theory. The author  provides all the mathematics needed in a clean and digestible delivery. All that he assumes is basic familiarity with vector spaces, complex numbers, calculus, linear algebra but provides appendices to refresh the reader. After completing this book you will have a clear understanding for the current theory behind the physical world and how the mathematics of symmetry tells us this. The only critique I have is, it would be nice to see some examples working out the "mechanics"  of the math . This book is just a pleasure to have read.