The Structure of Matter: An Introduction to Quantum Mechanics originates from the first part of Physical Chemistry, Second Edition, by R. Stephen Berry, Stuart A. Rice, and John Ross (OUP 2000). Published now as a separate volume, The Structure of Matter is designed for introductory quantum mechanics courses at the advanced undergraduate and beginning graduate level. Based on a framework of molecular structure and the theory of quantum mechanics, it discusses the nature and behavior of molecules, starting with the simplest atom (hydrogen), and progressing to two-electron atoms, complex diatomic molecules, larger molecules, and intermolecular forces. In keeping with its parent book, this authoritative text is rigorous, challenging, and offers the most comprehensive treatment available, making it a valuable reference for researching chemists and professionals.