This book investigates the complex mechanisms of policy-making and constitutional development within the European Union by analyzing the divergent positions of member states and accession countries. Authors Simon Hug and Thomas König, both established scholars in political science, utilize a systematic, comparative framework to evaluate how national governments navigate the pressures of European integration. By examining the two-level policy formation process, the authors argue that constitutional decision-making significantly impacts national sovereignty and citizen life, regardless of the final ratification status of the proposed documents.

Experts recognize this volume as a rigorous, data-driven contribution to the study of European integration and institutional design. Scholars frequently cite the text for its systematic approach to comparing national bargaining strategies within the European Union framework.