Usually most of the great scientists who write physics books refuse to put in their writings any equations pretext that their book would not sell (From their publisher !!) Balance hundreds of pages to explain this a well commented equation requires only a few pages !! This is demonstrated beautifully IAN STEWARD. Small problem, if the first 15 chapters are excellent the last feel a little tired and a bit out of the frame of physics for my taste! However I strongly recommend it !! Happy reading !!