The book progresses logically, starting with the history of OTEC, from initial concepts to pilot plants. It examines the different OTEC system designs like closed-cycle, open-cycle, and hybrid cycle. The book also addresses environmental considerations, such as impacts on marine ecosystems, and analyzes the economic viability of OTEC, including capital and operational costs. This approach provides a comprehensive understanding of OTEC for students, researchers, and policymakers interested in sustainable energy solutions.