Bioenergetics is the name given to the collection of disciplines within biochemistry and physiology that aims at a description and understanding of the function of living systems. These functions include the exchange, metabolism and accumulation of matter, as well as their related energy transformations. The authors present an accessible textbook, providing the reader with the fundamental principles of the subject and how these can then be applied to practical problems. This textbook is ideal for graduate students and researchers in biochemistry, physiology and chemistry. The book should also be of interest to workers in the applied life sciences.