Derived from lectures at the University of Freiburg, this textbook introduces solid-state physics as well as the physics of liquids, liquid crystals and polymers. The five chapters deal with the key characteristics of condensed matter: structures, susceptibilities, molecular fields, currents, and dynamics. The author strives to present and explain coherently the terms and concepts associated with the main properties and characteristics of condensed matter, while minimizing attention to extraneous details. As a result, this text provides the firm and broad basis of understanding that readers require for further study and research.