Essentials of Geochemistry provides readers with a solid understanding of the fundamentals and approaches for doing modern geochemical analysis, including thermodynamic and kinetic modeling. Dr. Walther's text uses a unique "concepts of chemical equilibrium" approach, which considers the chemical reactions that occur, and offers both an environmental and quantitative focus to introduce students to the basic chemical principles important for studying the Earth. This timely, accessible text features several examples and end-of-chapter problems designed to maximize students' comprehension of the rapidly advancing field of geochemistry.