This comprehensive‎,‎ self‎-contained guide to X‎-ray spectroscopy will equip you with everything you need to begin extracting the maximum amount of information available from X‎-ray spectra‎.‎ Key topics such as the interaction between X‎-rays and matter‎,‎ the basic theory of spectroscopy‎,‎ and selection and sum rules‎,‎ are introduced from the ground up‎,‎ providing a solid theoretical grounding‎.‎ The book also introduces core underlying concepts such as atomic structure‎,‎ solid‎-state effects‎,‎ the fundamentals of tensor algebra and group theory‎,‎ many‎-body interactions‎,‎ scattering theory‎,‎ and response functions‎,‎ placing spectroscopy within a broader conceptual framework‎,‎ and encouraging a deep understanding of this essential theoretical background‎.‎ Suitable for graduate students‎,‎ researchers‎,‎ materials scientists and optical engineers‎,‎ this is the definitive guide to the theory behind this powerful and widely used technique‎.‎