This book aims to address 'boat migration' with a holistic approach. The different chapters consider the multiple facets of the phenomenon and the complex challenges they pose, bringing together knowledge from several disciplines and regions of the world within a single collection. Together, they provide an integrated picture of transnational movements of people by sea with a view to making a decisive contribution to our understanding of current trends and future perspectives and their treatment from legal-doctrinal, legal-theoretical, and non-legal angles. The final goal is to unpack the tension that exists between security concerns and individual rights in this context and identify tools and strategies to adequately manage its various components, garnering an inter-regional / multi-disciplinary dialogue, including input from international law, law of the sea, maritime security, migration and refugee studies, and human rights, to address the position of 'migrants at sea' thoroughly.