This book studies the normative intersection between integration, immigration and nationality in the European Union (EU). It examines the relationship between integration and the legal frameworks of admission, stay and access to nationality by third country nationals at national and European levels. Integration is being subject to multifaceted processes transforming its traditional policy and legal settings, as well as its classical theoretical premises and approaches. The Europeanisation of immigration policy has provoked the emergence of distinctive European approaches on integration. The legal elements of integration are being developed through two parallel settings: the EU Framework on Integration and European immigration law. These venues constitute two of the main pillars upon which the common EU immigration policy is being constructed, and their nexus raises several elements in need of reflection and study. This book examines the processes through which integration becomes a norm in nationality and immigration law and policy at the national and EU levels, and the implications of these processes for the legal status of third country nationals and the overall coherency of the common EU immigration policy.