This is an up-to-date account of the principles and practice of inelastic and spectroscopic methods available at neutron and synchrotron sources. Each chapter, written by a leading specialist in the field, introduces the basic concepts of the technique and provides an overview of recent work. This volume, which focuses on spectroscopic techniques in synchrotron radiation and inelastic neutron scattering, will be a primary source of information for physicists, chemists and materials scientists who desire a basic understanding of these techniques and the possibilities they offer.