This book outlines the traditionally difficult relations between Poland and Ukraine and assesses the changes in the last decade, which have resulted in very constructive bilateral relations between the two states. The authors argue that the strengthening of bilateral ties bodes well for stability in Europe, and is a welcome development in the context of the integration process currently proceeding apace across the continent. Ironically, the very process of integration is having less than benign effects on Warsaw’s relations with Kiev. Despite the best intentions of political elites in both countries, the conditions the EU requires of Poland will inevitably have a deleterious impact on relations with Ukraine, particularly in terms of cross-border trade and free movement of people, which is not desired by all Polish regions. The book thus explores how Warsaw and Kiev are attempting to balance EU and regional demands.