This introduction presents an overview of key concepts discussed in the subsequent chapters of this book. The book explains the theoretical framework, the analytical concepts, and the methodology of analysis. It deals with the policy areas, which includes trade policy, agricultural policy, energy policy, social and employment policy, regional policy, security and justice, foreign and security policy, minority protection and human rights policy, gender policy and educational and research policy. The book explains Aylin Guney and Ali Tekin come back and provide a comparative scorecard assessment of the policy areas with regard to the impact and outcomes of Turkey's Europeanization process. Europeanization literature started to take shape in the late 1990s with the increasing pace of widening and deepening efforts of the EU. The Europeanization studies primarily aimed to "answer how European policies, rules and norms are affecting domestic political systems.