Many books and articles have been written in which it is attempted to make the basic ideas of quantum physics available to a larger public. None of these is remotely as lucid as Treiman's book. His entertaining style, his mastery, as well as his love of the subject are manifest on nearly every page. It is superbly written.—Abraham Pais, Rockefeller University, author of A Tale of Two Continents and Subtle is the Lord: The Science and Life of Albert Einstein"Sam Treiman brings to the general reader an enormous wisdom and depth of understanding accumulated over a distinguished career in particle physics. An outstanding book!"—A. Zee, Institute for Theoretical Physics, University of California, Santa Barbara, author of Fearful Symmetry and An Old Man's Toy"Professor Treiman has achieved a pedagogical miracle. He jumps over the drudgery of standard introductory physcis courses and reaches the excitement of modern elementary particle physics by going directly to the quantum theory that describes this sub-microsopic world and its constituents."—Marvin L. Goldberger, University of California, San Diego