This comprehensive and topical text-book covers curricula of Non-conventional, Renewable and Conventional Energy Sources and Technologies for the final year students doing their BE/ME Courses in Mechanical, Electrical, Chemical and Energy Engineering. Every energy conversion route from primary source to final utilisation has been well illustrated in detail. The book covers conventionals (Coal, Natural Gas, Hydro, Nuclear fission) and the Non Conventionals and Renewables (Solar PV, Solar Thermal, Wind Geothermal, Biomass, Urban and Rural Waste, Ocean Thermal, Ocean Wave, Mini-hydro, Ocean tide, Nuclear fusion etc.). The book gives energy studies by co-relating thermodynamics, electrical energy, biomass energy, chemical energy, nuclear energy, exergy and anergy, environmental aspects. Modern Energy Conversion Plants from 21st Century have also been illustrated. Energy Strategy, Energy Management and Energy Conservation Opportunities have been elaborated. The book presents the Integrated Energy Study in SI units. The book is recommended from HRD Courses in Energy Sector, Power Sector, and also for Economic Planners, and Energy Managers.