The book begins with a brief review of some basic principles of crystalline solidstate physics and chemistry. The topics covered in the main part of the book (1) disordered crystalline solids, including macroscopic defects, incommensurate phases, low dimensional systems (correlated electrons), heavily doped and compensated semiconductors, ternary semiconductors and metals, quasicrystals, and disordered molecular crystals (inorganic and organic); (2) amorphous solids (inorganic and organic), including structure and models of structure, electronic structure, vibrational properties, optical properties, electronphonon interactions, defects, magnetic properties, and superconductors.