This monumental two-volume work is one of the most extensive treatments of solid state theory ever published. Intended primarily for professional theoretical physicists and postgraduate students, it offers detailed, thorough coverage of the most important aspects of solid state physics, presented in an unusually readable manner. Volume I deals with the fundamental theory of the equilibrium properties of perfect crystalline solids. Major topics include: Band Theory and Crystal Symmetry; Collective Effects in Solids; Lattice Waves; Spin and Orbital Magnetism; and Interaction of Particles with a Crystal.