This a textbook for students new to solid-state physics or materials science. The topics covered include basic crystal structure, diffraction, defects, dislocations, specific heat, phonons, thermal and electrical conductivities of metals, insulators and semiconductors, the physics of the p-n juction, magnetic and dielectric properties, superconductivity, and amorphous materials. Each chapter is accompanied by a set of problems, some of which extend the work treated in the text. There is also a chapter on the properties of amorphous solids.