1. Introduction PART I: HEAT ENGINES 2. A Minimum of Thermodynamics and of the Kinetic Theory of Gases 3. Mechanical Heat Engines 4. Ocean Thermal Energy Converters 5. Thermoelectricity 6. Thermionics 7. AMTEC 8. Radio-Noise Generators PART II: THE WORLD OF HYDROGEN 9. Fuel Cells 10. Hydrogen Production 11. Hydrogen Storage PART III: ENERGY FROM THE SUN 12. Solar Radiation 13. Biomass 14. Photovoltaic Converters PART IV: WIND AND WATER 15. Wind Energy 16. Ocean Engines PART V: LAND AND BEYOND 17. Nuclear Energy 18. Storage of Energy