I Fundamentals of Electron Theory.- 1 Introduction.- 2 The Wave-Particle Duality.- 3 The Schrödinger Equation.- 4 Solution of the Schrödinger Equation for Four Specific Problems.- 5 Energy Bands in Crystals.- 6 Electrons in a Crystal.- II Electrical Properties of Materials.- 7 Electrical Conduction in Metals and Alloys.- 8 Semiconductors.- 9 Electrical Conduction in Polymers, Ceramics, and Amorphous Materials.- III Optical Properties of Materials.- 10 The Optical Constants.- 11 Atomistic Theory of the Optical Properties.- 12 Quantum Mechanical Treatment of the Optical Properties.- 13 Applications.- IV Magnetic Properties of Materials.- 14 Foundations of Magnetism.- 15 Magnetic Phenomena and Their Interpretation-Classical Approach.- 16 Quantum Mechanical Considerations.- 17 Applications.- V Thermal Properties of Materials.- 18 Introduction.- 19 Fundamentals of Thermal Properties.- 20 Heat Capacity.- 21 Thermal Conduction.- 22 Thermal Expansion.- Appendices.- App. 1. Periodic Disturbances.- App. 2. Euler Equations.- App. 3. Summary of Quantum Number Characteristics.- App. 4. Tables.- App. 5. About Solving Problems.