Since the publication of the first edition over 50 years ago, introduction to solid state physics has been the standard solid state physics text for physics majors. The author's goal from the beginning has been to write a book that is accessible to undergraduate and consistently teachable. The emphasis in the book has always been on physics rather than formal mathematics. With each new edition, the author has attempted to add important new developments in the field without sacrificing the book's accessibility and teachability. · crystal structure. · wave diffraction and the reciprocal lattice. · crystal binding and elastic constants. · phonons i. Crystal vibrations. · phonons ii. Thermal properties. · free electron fermi gas. · energy bands. · semiconductor crystals. · fermi surfaces and metals. · superconductivity. · diamagnetism and paramagnetism. · ferromagnetism and antiferromagnetism. · magnetic resonance. · plasmons, polaritons, and polarons. · optical processes and excitons. · surface and interface physics. · nanostructures. · noncrystalline solids. · point defects. · dislocations. · alloys.