Designed as a textbook for undergraduate students of engineering, physics and chemistry, the book exposes the fundamental knowledge of Crystal Structure, Crystal Defects and Bonding in Solids. The text deals with Introductory Quantum Physics, Electrical Properties of Materials, Band Theory of Solids, Semiconducting Materials and Dielectric Materials. Moreover, Properties of Superconducting Materials as well as Optical Properties of Materials and Magnetic Properties of Materials are emphasized in an explicit way.