This book provides a unique, comprehensive, and up-to-date overview of the various NADPH oxidases and narrates the history of their discovery, biochemical characteristics, genetics, molecular structure, and multiple functions in health and disease. It covers the subject in a manner that serves both the expert and the novice researcher in the field. The book starts with an overview of the major milestones in the discovery of the archetypical NADPH oxidase, known as cytochrome b558, and its cytosolic regulators. This is followed by personal recollections by pioneers of the field, descriptions of the work of the major figures of the past by their followers, and a rendering of the history of the discovery of the Nox family. The central section of the book consists of chapters devoted specifically to an in depth description of the individual members of the Nox family, and is followed by chapters focused on the modulators of their function. A subsequent section comprises chapters dealing with methodologies of Nox research, interaction with other proteins, and Nox inhibitors. A distinct section of the book deals with non-mammalian Noxs, from amoeba to zebrafish. Subsequent chapters focus on Nox structure, a field in which extraordinary progress was made in recent years. The volume ends with chapters on Chronic Granulomatous Disease, the consequence of Nox loss-of-function, and its treatment by gene therapy. The coda is a crystal ball perspective of the hopes for the clinical translation of basic Nox research. Written for biochemists, cell biologists, molecular biologists, and clinicians, this book is aimed at both senior scientists and young investigators in the field.