Physics Nobelist Feynman simply cannot help being original. In this quirky, fascinating book, he explains to laymen the quantum theory of light, a theory to which he made decisive contributions.--The New Yorker Feynman's lectures must have been marvelous and they have been turned into an equally entrancing book, a vivid introduction to QED which is leavened and enlivened by his wit. Anyone with a curiosity about physics today should buy it, not only to get to grips with the deepest meaning of quantum theory but to possess a slice of history.--Pedro Waloschek, Nature Praise for Princeton's original edition: Feynman simply cannot help being original. In this quirky, fascinating book, he explains to laymen the quantum theory of light.--New Yorker Praise for Princeton's original edition:[A]nother tour de force by the acknowledged master of clear explanation in physics.--John Roche, Times Literary Supplement Praise for Princeton's original edition:Feynman's lectures must have been marvellous and they have been turned into an equally entrancing book, a vivid introduction to QED which is leavened and enlivened by his wit. Anyone with a curiosity about physics today should buy it, not only to get to grips with the deepest meaning of quantum theory but to possess a slice of history.--Pedro Waloschek, Nature Praise for Princeton's original edition: In four conversational and breezy chapters... Feynman, who himself gave the theory its most useful and powerful form, undertakes without one equation to explain QED to the generality of readers.--Philip Morrison, Scientific American Using clear language, many visuals, and his own Feynman diagrams, the author presents a clear introduction to the quantum theory of the inter-action of light with matter, without mathematics but with humor.--Physics Teacher