This book should be required reading for every physicist and every physics student. While the technical material can be tough going, it can be skipped over, and there is much personal history to interest the lay reader. Schwinger's accomplishments were not just comparable to Feynman's; they were much greater. Only by reading this book can one appreciate all that he did, including anticipating electroweak unification, introducing the Higgs mechanism, and proving the spin-statistics theorem. Most importantly, he perfected Quantum Field Theory (his third trip "up the mountain"). The tragedy is that, like most of Schwinger's work, QFT has been abandoned and forgotten - at least in its true meaning of a world made of fields - leaving the world to drown in a sea of chaos caused by the particle picture. As I show in my book for the lay reader [ASIN:0473179768 Fields of Color: The theory that escaped Einstein], which is dedicated in part to the memory of Julian Schwinger, only QFT can resolve the paradoxes of relativity and quantum mechanics that arise from the particle view.