The petrogenesis of metamorphic rocks is a comprehensive study of the processes that lead to the formation of metamorphic rocks. The book, "Petrogenesis of Metamorphic Rocks," is a revised second edition of a previously published work. The author, Helmut G. F. Winkler, is a professor at the University of Göttingen, Germany. The book was translated into English by N. D. Chatterjee and E. Froese. The book is intended for students of petrology, geology, and geochemistry, and aims to provide a thorough understanding of the origin of metamorphic rocks. The book begins with an introduction to metamorphism, its types, and the factors that influence it. It then discusses the concept of metamorphic facies, which are groups of minerals that form under specific temperature and pressure conditions. The book covers various metamorphic reactions in carbonate rocks, including those at low, higher, and very high temperatures. It also discusses the graphical representation of metamorphic mineral parageneses, such as ACF and AFM diagrams. The book explores different metamorphic facies series, including the Barrovian-type and Abukuma-type facies series, and discusses the mineralogical identity between regional metamorphism of the Abukuma-type and deep-seated contact metamorphism. It also covers intermediate facies series, granulite facies, eclogites, and the change of chemical composition of minerals with progressive metamorphism. The book discusses burial metamorphism, the temperature and pressure conditions of regional dynamothermal metamorphism, anatexis, formation of migmatites, and the origin of granitic magmas. The book is based on a lecture course and is intended to serve as a textbook for students of petrology, geology, and geochemistry. It includes a comprehensive index and references to literature for further study. The author thanks his colleagues, the Deutsche Forschungsgemeinschaft, and the publishers for their support and assistance in the preparation of the book. The book is a translation of the German edition, with various modifications and revisions. The author invites research workers and students to provide feedback and constructive suggestions for a more thorough understanding of the petrogenesis of metamorphic rocks.The petrogenesis of metamorphic rocks is a comprehensive study of the processes that lead to the formation of metamorphic rocks. The book, "Petrogenesis of Metamorphic Rocks," is a revised second edition of a previously published work. The author, Helmut G. F. Winkler, is a professor at the University of Göttingen, Germany. The book was translated into English by N. D. Chatterjee and E. Froese. The book is intended for students of petrology, geology, and geochemistry, and aims to provide a thorough understanding of the origin of metamorphic rocks. The book begins with an introduction to metamorphism, its types, and the factors that influence it. It then discusses the concept of metamorphic facies, which are groups of minerals that form under specific temperature and pressure conditions. The book covers various metamorphic reactions in carbonate rocks, including those at low, higher, and very high temperatures. It also discusses the graphical representation of metamorphic mineral parageneses, such as ACF and AFM diagrams. The book explores different metamorphic facies series, including the Barrovian-type and Abukuma-type facies series, and discusses the mineralogical identity between regional metamorphism of the Abukuma-type and deep-seated contact metamorphism. It also covers intermediate facies series, granulite facies, eclogites, and the change of chemical composition of minerals with progressive metamorphism. The book discusses burial metamorphism, the temperature and pressure conditions of regional dynamothermal metamorphism, anatexis, formation of migmatites, and the origin of granitic magmas. The book is based on a lecture course and is intended to serve as a textbook for students of petrology, geology, and geochemistry. It includes a comprehensive index and references to literature for further study. The author thanks his colleagues, the Deutsche Forschungsgemeinschaft, and the publishers for their support and assistance in the preparation of the book. The book is a translation of the German edition, with various modifications and revisions. The author invites research workers and students to provide feedback and constructive suggestions for a more thorough understanding of the petrogenesis of metamorphic rocks.