This book deals with the scope and nature of the EU’s external influence over South-Eastern Europe in the present enlargement. By elaborating on the Europeanization of the Western Balkans in a systematic, theory-oriented and comparative way, the book provides rich insight into the dynamics of the current enlargement and offers a comprehensive analysis of the EU’s avenues of external leverage in the field of justice and home affairs, a key sector of cooperation in the EU-Western Balkans relations. The book is an important contribution towards a better understanding of how the EU’s use of pre-accession conditionality has changed since the Eastern enlargement. It will be of interest to decision-makers, officials and academics concerned with adaptation and transformation processes in South-Eastern Europe and the possibilities and limitations of the EU’s influence in the outside world.