Aimed at graduate students and researchers, this book provides a comprehensive study of interfaces within and between materials, a central concern to all materials scientists. It is comprised of four parts, covering the structure, thermodynamics, kinetics, and properties of interfaces in crystalline materials. Emphasis throughout is on conceptual foundations through the exposition of simple models and descriptions of key experimental observations. The reader is taken through the foundations to the forefront of current research by two of the leading researchers in the area. Due to high levels of demand for use as a textbook, the original edition-- published in 1995-- has been reprinted and reissued with a less expensive hardcover binding.