“The starting point of the research presented in this book was to revisit the classics and the theoretical foundations of the relationship between EU and international law" (219), with this incipit Tamás Molnár opens up the final chapter of his monograph, in which the key issues dealt with in previous chapters are critically assessed and assembled. Such a statement of purpose immediately reveals to the reader that this book intends to be much more than a contribution to the already rich legal scholarship on international migration law and EU return and readmission policies.1 Indeed, these substantive fields of analysis are accurately chosen and examined to elucidate the progressive interconnectedness between the international and EU legal regimes, the changing rationales behind it and the “dark side" of these multi-layered and overlapping normative and regulatory systems.