This book traces the practices of migration control and its contestation in the European migration regime in times of intense politicization. The collaboratively written work brings together the perspectives of state agents, NGOs, migrants with precarious legal status, and their support networks, collected through multi-sited fieldwork in eight European states: Austria, Denmark, Germany, Italy, Latvia, Lithuania, Sweden and Switzerland. The book provides knowledge of how European migration law is implemented, used, and challenged by different actors, and of how it lends and constrains power over migrants journeys and prospects. An ethnography of law in action, the book contributes to socio-legal scholarship on migration control at the margins of the state.