The study of interfaces within and between materials is a central field which is relevant to almost all aspects of materials science. This book is intended to serve as a graduate text consisting of four inter-related parts spanning the structure, thermodynamics, kinetics, and properties of interfaces in crystalline materials. Emnphasis is placed on the conceptual foundations of the subject through the exposition of simple models and descriptions of key experimental
observations. In this way the reader is systematically taken to the forefront of the subject.