This volume provides, for the first time, the material that is essential for an informed debate. It discusses how national parliaments have adapted to the effects of the Single European Act and the Maastricht Treaty. Detailed studies of ten national parliaments lead to conclusions as to how they have adapted, or not adapted to European integration. The authors look at each parliament from the time of membership, identifying the key stages of institutional change. These case studies are complemented by an analysis of how national parliaments are viewed by institutions of the European Union that set the agenda for change and face the problems of remedying the perceived democratic deficit within the EU.