Westview Press is pleased to offer a new, paperback Student Economy Edition of our best-selling title, "Introduction to Quantum Field Theory." Student Economy Editions are the same high-quality Westview texts you've always known, now priced for about the same cost as renting a print text. "An Introduction to Quantum Field Theory" is a textbook intended for the graduate physics course covering relativistic quantum mechanics, quantum electrodynamics, and Feynman diagrams. The authors make these subjects accessible through carefully worked examples illustrating the technical aspects of the subject, and intuitive explanations of what is going on behind the mathematics. After presenting the basics of quantum electrodynamics, the authors discuss the theory of renormalization and its relation to statistical mechanics, and introduce the renormalization group. This discussion sets the stage for a discussion of the physical principles that underlie the fundamental interactions of elementary particle physics and their description by gauge field theories.