The Feynman path integrals are becoming increasingly important in the applications of quantum mechanics and field theory. The path integral formulation of quantum anomalies, i.e. the quantum breaking of certain symmetries, can now cover all the known quantum anomalies in a coherent manner. In this book the authors provide an introduction to the path integral method in quantum field theory and its applications to the analyses of quantum anomalies. No previous knowledge of field theory beyond advanced undergraduate quantum mechanics is assumed. The book provides the first coherent introductory treatment of the path integral formulation of chiral and Weyl anomalies, with applications to gauge theory in two and four dimensions, conformal field theory and string theory. Explicit and elementary path integral calculations of most of the quantum anomalies covered are given. The conceptual basis of the path integral bosonization in two-dimensional theory, which may have applications to condensed matter theory, for example, is clarified. The book also covers the recent interesting developments in the treatment of fermions and chiral anomalies in lattice gauge theory. "Definitely a book that will fill a need at the graduate and research level." -- - Ian Aitchison, University of Oxford "An excellent addition to the literature by one of the pioneers in understanding anomalies." -- Roman Jackiw, Massachusetts Institute of Technology Self-contained introduction to the path integral method in field theory and its applications to quantum anomalies. Kazuo Fujikawa, Department of Physics, University of Tokyo, Japan ,Hiroshi Suzuki, Department of Mathematical Sciences, Ibaraki University, Japan