Book excerpt: This book is an essential resource describing a wide range of approaches and technologies in the areas of quantitative EEG (QEEG) and neurotherapy including neurofeedback and neuromodulation approaches. It emphasizes practical, clinically useful methods, reported by experienced clinicians who have developed and used these approaches first hand. These chapters describe how the authors approach and use their particular combinations of technology, and how clients are evaluated and treated. This resource, which is encyclopedic in scope, provides a valuable and broad, yet sufficiently detailed account, to help clinicians guide the future directions in client assessment and neurotherapeutic treatment. Each contribution includes literature citations, practical information related to clinical interventions, and clinical outcome information.