This open access book explores the conceptual challenges posed by the presence of migrants with irregular immigration status in Europe and the evolving policy responses at European, national and municipal level. It addresses the conceptual and policy issues raised, post-entry, by this particular section of the migrant population.  Drawing on evidence from different parts of Europe, the book takes the reader through philosophical and ethical dilemmas, legal and sociological analysis to questions of public policy and governance before addressing the concrete ways in which those questions are posed in current policy agendas from the international to the local level. As such this book is a valuable read to researchers, practitioners and policy makers as well as to students working on irregular migration in Europe in a comparative and/or country based perspective.

Sarah Spencer is Director of the Global Exchange on Migration and Diversity and a Senior Fellow at COMPAS at the University of Oxford. Her particular interests are in irregular migrants, integration, human rights and equality issues, and in the policy making process. She was an Open Society Fellow (2012-2014), exploring issues relating to irregular migrants in Europe and is a Visiting Professor at the Human Rights Centre, University of Essex. Sarah was awarded her doctorate at Erasmus University Rotterdam, has an MPhil from University College London and took her first degree at the University of Nottingham.

Anna Triandafyllidou is the Canada Excellence Research Chair in Migration and Integration, at Ryerson University, Toronto, Canada. She was previously Robert Schuman Chair at the Global Governance Programme of the European University Institute (Robert Schuman Centre for Advanced Studies, 2012-2019) where she directed the Cultural Pluralism Research Area.  She is the Editor-in-Chief of the Journal of Immigrant and Refugee Studies, Chair of the IMISCOE Editorial Committee, and member of the IMISCOE Board of Directors. She has been Visiting Professor at the College of Europe in Bruges between 2002 and 2018. Her recent books include: Migration and Globalisation Handbook (E. Elgar, ed. 2018); The Problem of Religious Diversity: European Challenges, Asian Approaches (with T. Modood, ed. Edinburgh University Press, 2018); Multicultural Governance in a Mobile World (ed. Edinburgh University Press, 2018); Global Governance from Regional Perspectives (Oxford University Press, ed., 2017).