As a physics amateur I love to read popular books about the fundamental workings of the universe.  However, I have always been confused by the "high level" references to symmetry or "symmetry breaking".  What does all that really mean?  This book is finally helping me make sense of it all.  With appendices that help address the mathematical tools necessary, the main text explains the role of symmetry in nature at just the right level to give the reader a good understanding of the concepts without getting lost in the weeds.  This book is a challenging but rewarding read for any enthusiast who has some physics and math background but wants to go deeper.  I highly recommend it.