Foreword. Introduction. Part I. Analysis of Surface Systems. Patterns of heat demand. Primary heat exchangers in geothermal schemes. Room heaters in geothermal schemes. Heat pumps. Heating networks: layout and operation. Heating networks: analysis of network temperatures and flows. Costs of heating networks. Geothermal heat supply calculations. Part II. Subsurface Developments. Well drilling. Geothermal fluid production. Part III. Geothermal Economics and Case Studies. Methods of appraisal. Market aspects of geothermal developments. Pre-feasibility assessment of the Garges schemes. Sensitivity studies of geothermal economics. French geothermal schemes. Geothermal heating in the USA. Geothermal district heating in Iceland. Appendices. Index.