This work covers the subject of the petrology of the metamorphic rocks, including such subjects as rock and mineral compositions and their relationship, metamorphism associated with igneous intrusions, dynamic metamorphism, extra-terrestrial metamorphism and metamorphism in collision zones. The book uses examples of the field relationships of metamorphic rocks and their appearance in thin section; discusses the thermodynamic and analytic methods concerned; describes methods for determining the temperatures and deformations of the rocks and demonstrates how thermodynamic modelling enables them to be interpreted as the outcome of plate tectonics.