This book brings together two developments. First, it presents the new state of the art of research on migration and integration in Europe, thereby constituting a fol- low- up to the fi rst IMISCOE Research Network book Dynamics of International Migration and Settlement in Europe, edited by R. Penninx, M. Berger and K. Kraal and published by Amsterdam University Press. Second, the initiative for this book was triggered by the INTERACT research project, led by the Migration Policy Centre of the European University Institute (EUI) in Florence and fi nanced by the European Commission’s European Investment Fund. The INTERACT project’s aim is to study ‘the impact of origin countries on the integration of migrants in host countries’ and to identify and analyse ‘the links established between migrants and their countries of origin, [including] their nature, the actors involved (individual and collective, state or non-state) and their impact on the various dimensions (economic, civic and political, cultural, social) of migrants’ integration in the host country’ (EIF grant application form, December 2012).