The book is clearly organized. The first three chapters are devoted to explaining the techniques involved in producing and interpreting EEGs, positron and single emission tomographs, and magnetic resonance images (MRIs). Each of these chapters is written clearly with most technical details at the level of the informed nonexpert physician. All major subcategories of imaging are covered, including tomographic EEG, functional MRI, magnetic resonance spectroscopy, and dynamic susceptibility contrast MRI. A realistic and measured account of the types of physiological and clinical knowledge gained from these technologies is outlined. At the same time, the multiple technical, methodological, and statistical problems that are yet to be resolved and that greatly inhibit the reliability, validity, and practical use of the data produced are forthrightly acknowledged.