An excellent easy-to-follow book on the formulation of physics based on symmetry considerations. Highly recommended to those who want to see a development of fundamental physical laws from a series of simple arguments.<br><br>The author is also very knowledgeable about various topics (Lie algebra, Standard model etc) from numerous resources and references. Calculations are shown in detail. Hard topics are not watered down. References are given for topics that stray away too much. There are still some minor typos in the second edition (although an Errata can be found online). I am not a big fan of books with large page sizes as they are hard to carry around and to read while lying down. However, the remarks in the column sidenotes are really helpful.