The book provides major contributions to the literature, including theoretical and empirical. In the literature geopolitics, economics, and environmental studies are frequently used as a theoretical framework to explore issues relating to energy. This book strives to draw a distinct theoretical framework from the more prevalent geopolitical approaches. To understand the energy security relationship that exists between Türkiye and Europe, the author addressed the issue with Buzan’s structural interpretation, which made use of one of the international relations theories, the English School. Based on Buzan’s approach, Korkmaz utilizes the concept of an energy security society. The author’s goal in using this concept is to improve our understanding of society by using primary institutions. The book’s second addition to the literature stems from its inquisition into the attitudes of different Turkish players on energy security in the context of natural gas cooperation with the EU. This book analyzes in detail the stance of the actors involved. It offers energy researchers a comprehensive examination of Turkish and European energy supply security.