The book "Petrogenesis of Metamorphic Rocks" by H. G. F. Winkler, revised in its second edition, provides a comprehensive overview of the petrogenesis of metamorphic rocks. The author, translated by N. D. Chatterjee and E. Froese, emphasizes the mineralogical-chemical aspects of metamorphism, focusing on the reactions that transform the mineral composition of rocks under metamorphic conditions. The book covers various topics, including the definition and types of metamorphism, factors influencing metamorphism, the concept of metamorphic facies, and specific reactions in different rock types such as carbonate rocks. It also discusses graphical representations of mineral parageneses, contact metamorphism, regional dynamothermal metamorphism, and the temperature and pressure conditions of different metamorphic facies. The book is designed as a textbook for students of petrology, geology, and geochemistry, and includes a detailed index and a section on nomenclature of common metamorphic rocks. The author acknowledges the contributions of various colleagues and institutions, and expresses gratitude to the publishers for their support.The book "Petrogenesis of Metamorphic Rocks" by H. G. F. Winkler, revised in its second edition, provides a comprehensive overview of the petrogenesis of metamorphic rocks. The author, translated by N. D. Chatterjee and E. Froese, emphasizes the mineralogical-chemical aspects of metamorphism, focusing on the reactions that transform the mineral composition of rocks under metamorphic conditions. The book covers various topics, including the definition and types of metamorphism, factors influencing metamorphism, the concept of metamorphic facies, and specific reactions in different rock types such as carbonate rocks. It also discusses graphical representations of mineral parageneses, contact metamorphism, regional dynamothermal metamorphism, and the temperature and pressure conditions of different metamorphic facies. The book is designed as a textbook for students of petrology, geology, and geochemistry, and includes a detailed index and a section on nomenclature of common metamorphic rocks. The author acknowledges the contributions of various colleagues and institutions, and expresses gratitude to the publishers for their support.