This book develops further ideas and arguments expressed in a number of recent publications. Chapter 3 is an updated and extended version of V. Mitsilegas, ‘The Changing Landscape of the Criminalisation of Migration in Europe. The Protective Function of European Union Law’ published in M. Guia, M. Van der Woude and J. Van der Leun (eds.), Social Control and Justice. Crimmigration in an Age of Fear, Eleven International Publishing, 2012, pp. 87–114. Parts of Chap. 4 develop further ideas and arguments presented in V. Mitsilegas, ‘Solidarity and Trust in the Common European Asylum System’ published in Comparative Migration Studies, vol. 2, 2014, pp. 231–253 and V. Mitsilegas, ‘Immigration Detention, Risk and Human Rights in the Law of the European Union. Lessons from the Returns Directive’ to be published in M. Guia, V. Mitsilegas and R. Koulish (eds.), Immigration Detention, Risk and Human Rights, Springer, forthcoming. This book is dedicated to my EU Justice and Home Affairs LLM students and to the group of brilliant Queen Mary Ph.D. candidates currently researching their theses on migration and criminal law under my supervision. You are inspirational