The second edition of the book builds on first edition material, but with significant updates on dramatic changes within the renewable energy sector over the last decade. As before, the book will discuss the basic technical aspects of major renewable energy systems and technological developments; the impact of politics on energy policy using contemporary theories of public policy (such as, Advocacy Coalition Framework (ACF), Punctuated Equilibrium (PE), Narrative Policy Framework, and Policy Diffusion), as well as discussing the evolution of the social feasibility of renewable energy. Alternative energy solutions, such as nuclear power, will remain in the second edition, but the section will be expanded to discuss nuclear power developments and feasibility in the post-Fukushima policy environment. International commitment to renewable energy will be highlighted in the manuscript to discuss the U.S. in context.