The Earth houses a vast energy supply in the form of geothermal resources. Domestic resources are equivalent to a 30,000 year energy supply at our current rate for the United States. Geothermal energy is used in all 50 U.S. states today. But, geothermal energy has not reached its full potential as a clean secure energy alternative because of issues with resources, technology, historically low natural gas prices, and public policies. These issues affect the economic competitiveness of geothermal energy. This book explores geothermal energy's viability, risk and cost analysis.