This introduction presents an overview of the key concepts discussed in the subsequent chapters of this book. The book explores some of the multiple modes of expression and attachment which young Muslims in Europe are constructing. It addresses the significance of the changing national and international context for the development of Muslim organization along religious, ethnic and political lines, either separately or in combination. These may involve new relationships between religion and politics, between public and private spheres and between migrant generations themselves. The book suggests that there are different responses to the novel context in which migrants and their children find themselves. It discusses the problems arising among runaway Moroccan and Turkish girls in the Netherlands. The book analyses a small group in a large metropolis, young Turks in London. It focuses on the differences between 13-18 year olds and their parents on a number of key issues: home; language; the preservation of tradition; and sexuality.