The integration of Muslims into European societies is often seen as a major challenge that is yet to be confronted. This book, by contrast, starts from the observation that on legal, political and organizational levels integration has already taken place. It showcases the variety of theoretical approaches that scholars have developed to conceptualize Muslim life in Europe, and provides detailed empirical analysis of ten European countries. Demonstrating how Muslim life unfolds between conviviality and contentious politics, the contributors describe demographic developments, analyze legal controversies, and explore the action of government and state, Muslim communities and other civil society actors. Driving forces behind the integration of Islam are discussed in detail and compared across countries.