This book provides an assessment of the unique contribution Moessbauer spectroscopy can make to the study of the bonding, structural, magnetic, dynamical and time-dependent properties of various systems. It comprises an edited collection of chapters by an international body of distinguished scientists writing on their individual areas of specialisation. The editors and authors aim to give the reader an in-depth understanding of the technique of Moessbauer spectroscopy in terms of the types of information it can provide, together with an appreciation of how this information can be related to that obtained from complementary techniques. This book will be of value to postgraduate students and research workers with no previous knowledge of the technique, but also to those experienced in the use of Moessbauer spectroscopy in a particular area wishing to gain either a wider overview of the technique or information about its use in another area.