Ukraine, which is undoubtedly a country of crucial importance both for NATO and the CIS, remains on agenda of the North Atlantic Alliance already almost 15 years. However, the case of Ukraine has always been and is still peculiar, which makes the debate on its membership painful not only in this country, but also in Russia and inside NATO itself. This book provides deep comprehensive analysis of the Ukraine-Russia-NATO relationship triangle, focusing on the debate on NATO membership in Ukraine. Without taking sides, the author gives an objective overview of history and nature of NATO-Ukraine relationship in frames of enlargement process, investigates influence of domestic factor on foreign policy in Ukraine, and reveals concealed conflicts of interests, interdependences and obstacles which form the basis of the debate in the country. Such a deep analysis will lead reader to conclusions and predictions which are especially relevant for Ukraine in the moment of political transformations. This book will be extremely interesting and useful for international relations students, professors, experts and generally for everybody who is concerned in this topic.