This volume investigates the extent to which European integration has fundamentally transformed national political systems across the continent. The authors, Klaus H. Goetz and Simon Hix, utilize a comparative political science framework to analyze how supranational institutions and policies interact with domestic governance structures. By examining institutional adaptation and policy convergence, the book argues that the impact of the European Union on member states is uneven, mediated by existing national political traditions and administrative legacies.

Experts in European studies identify this work as a foundational text for understanding the intersection of domestic and supranational politics. Readers frequently note the academic density of the prose and the rigorous analytical framework applied to complex political systems.