I am not usually inclined to write reviews but in this case.. what a wonderful book.  This text makes the world of particle physics accessible to those with a college level physics background and a basic understanding of quantum mechanical principles, relativity, and linear algebra.  I am in the medical profession but have a degree in physics from 1977.  I think that the text is written at an upper level undergraduate level.  For those who want to see the math at a basic level this is as good as it gets. The author has gone to great effort to write out all of the mathematical detail which is often lacking in other books.  The Higgs boson, gauge theory, electroweak mixing, quantum chromodynamics are all written with great clarity.  I am very happy with my purchase.