'One of the strengths of this book is its connectivity: topics as diverse as metallic clusters, high power laser effects on matter, Rydberg atoms and quantum chaology are sewn together with remarkable continuity, such that the book reads like a good novel … This graduate level textbook should be accessible to those with a good grounding in quantum mechanics and basic spectroscopy, and is potentially of interest to a range of physical chemists using VUV and X-ray probes of the character of chemical systems in both gaseous and condensed media.' T. P. Softley, Chemistry in Britain