This comprehensive guide to sustainable energy builds robust connections between abstract theory and practical applications, providing students with a global perspective on this most timely subject. Includes a succinct refresher on essential thermodynamics, fluid mechanics and heat transfer, giving students a solid foundation on which to build. Introduces technologies for hydropower, biomass, geothermal, ocean, solar and wind energy, and fuel cells, with material on nuclear energy, fossil fuel generation and future energy directions, providing a consistent framework for analyzing past, present and future energy systems. Provides coding examples, and real-world case studies, giving students experience in applying theory to practice. Supported by topics for classroom debate, video solutions, and links to online resources, to interactively engage students and inspire further exploration. With a consistent structure and pedagogy, over 160 end-of-chapter problems, and solutions for instructors, this is the ideal introduction for senior undergraduate and graduate students, and a resource for energy professionals.