This annual review of the literature provides a comprehensive and critical survey of a vast field of study involving organophosphorus compounds, ranging from phosphines, phosphine-related P–C bonded compounds and their chalcogenide derivatives, phosphonium salts and P-ylides, to tervalent and quinquevalent phosphorus acid derivatives and penta- and hexa-coordinated phosphorus compounds. Recent developments in applications as reagents in green synthetic procedures are also given. With an emphasis on interdisciplinary content, this book will appeal to the worldwide organic chemistry and engineering research communities.