The crisis in Ukraine that began in November 2013 constitutes a turning point in Euro-Atlantic security with potential global repercussions. It is the most significant security problem between Russia and the 'West' in the post Cold War period and the crisis has marked a new era in global politics. Contributions in this edited volume attempt to address a number of key aspects of the Ukrainian issue. How does the crisis impact upon Black Sea geopolitics and on regional governance? How can EU - Russia relations evolve under the new multipolar system? How is NATO affected? How important is the energy parameter in Russia-Ukraine-EU triangle? This edited volume aims to discloses the diverse narratives on the roots, evolution and repercussions of the crisis, indicating the extent of its complexity and highlighting important parameters of the Ukrainian issue. This book was originally published as a special issue of Southeast European and Black Sea Studies.