Modern isotope geochemistry is a rapidly expanding field that has a part to play in a broad range of earth and planetary sciences - from extra-solar system processes to environmental geoscience. this new edition of a popular textbook is completely updated and places more emphasis on the uses of radiogenic isotopes in environmental earth science. The author reviews the field of radiogenic isotope geology in a concise and visual manner to provide a comprehensive introduction to the subject and its wide variety of applications. For each technique, current ideas are presented in their historical context to allow the reader to understand the development of the theory. The latest ideas and methods, classic papers and case studies all come under scrutiny within this book. An accessible introduction for scientists from other disciplines and an important reference for students and researchers working in isotope geology.