This ground-breaking book challenges legal orthodoxy, presenting an original approach to the treatment of islands in international law. It offers a new perspective on how to define islands in international law, questioning how they differ from other maritime features. It focuses on the contextual factors that bear upon the legal treatment of islands, recognising that, in practice, islands have varied and unequal impacts and arguing that greater focus on context is needed to understand legal outcomes, particularly those concerning maritime boundary delimitation.