Energy law and policy is in transition, the scope which is wide and vast. This discipline itself is accompanying a profound social, environmental, and economic change or transformation. One could not diminish the significance of aspects of the transition that are not apparent in the overall picture. This book addresses different aspects of the phenomenon and tackles the energy field from the double perspective of law and policy. Scholars from France, the U.K., and the U.S. have written chapters on different areas of energy law and policy, analyzing different instruments, provisions, and objectives, and questioning the role of actors and institutions. This perspective stems from a broader view of the energy transition and security, but mostly from different approaches relying on law, politics, science, etc. This book presents reflections on concepts, foreign policy, regional and international cooperation, and the specific role the state is to play when it comes to such thing as energy law and policy. Victor B. Flatt is the Dwight Olds Professor of Law and is the Faculty Co-Director of the Environment, Energy, and Natural Resources (EENR) Center at the University of Houston Law Center. He is also a Distinguished Scholar of Carbon Markets at the University of Houston's Gutierrez Energy Management Institute. Alfonso López de la Osa Escribano is the Director of the Center of U.S. and Mexican Law, and Adjunct Faculty on Comparative Health Law of the Health Law and Policy Institute at the University of Houston Law Center. He is also affiliated with the Environment, Energy, and Natural Resources (EENR) Center. Aubin Nzaou-Kongo is a Marie Sklodowska-Curie Fellow in Law and Energy Policy at the Environment, Energy, and Natural Resources (EENR) Center, and at the Center of U.S. and Mexican Law at the University of Houston Law Center (U.S.). He is an Assistant Professor of Law at the University of Lyon 3 and a Visiting Assistant Professor at the University Savoie Mont-Banc.