Muons, radioactive particles produced in accelerators, have emerged as an important tool to study a range of phenomena in condensed matter physics and chemistry, including magnetism, superconductivity and molecular or chemical dynamics. The technique was originally the preserve of a few specialists located in particle physics laboratories. Today it is used all over the world by scientists from a very wide range of science backgrounds and interests. Drawing on the expertise of a varied team of contributors, this modern and engaging pedagogical introduction is written with the beginner in the field in mind. The book illustrates the numerous practical applications of muon spectroscopy across different areas of science, as well as providing many worked examples and problems to test understanding. Book jacket.