This 35 chapter, revised edition of Ashcroft and Mermin’s Solid State Physics (1976) maintains its predecessor’s style whilst covering novel developments in the field of solid state physics. Regarding electronic structure, density functional theory’s inclusion completes the description of the many-body electronic theory of crystals. The theory of harmonic crystal and superconductivity are similarly augmented. New chapters on semiconductor devices, piezoelectricity, applied magnetism, spintronics, and the Quantum Hall effect have been added. Various kinds of characterization methods of solids, including diffraction methods, are introduced in the beginning and the end chapters of the book. This book inherits the merit of the first edition, and endeavors to serve better all readers who are interested in solid state physics and related fundamentals in the physical science of high technology.