Fully updated and featuring a new chapter on enhanced geothermal systems, this second edition of a Choice Award winner contains the latest scientific information used to discern applications and regions best suited for geothermal energy. Stressing environmental effects related to acquisition and consumption, the text explores where geothermal energy comes from and how to find it, as well as how it can be accessed, applied, and improved for future use. It provides background, theory, and practical techniques for implementing different types of geothermal energy projects.