This Open Access book on Ocean Governance examines the diversity sustainability challenges facing our oceans today. The book is organized into three sections: knowledge systems, policy foundations and thematic analyses. The knowledge produced in the book was catalyzed by the scientific outcomes from collaborations within the European-funded Cooperation in Science and Technology (COST) network -Ocean Governance for Sustainability - Challenges, Options and the Role of Science-, a network embedded in the Horizon 2020 Programme of the European Union. This network brings together scientists, policy-makers and civil society representatives from 28 nation states to create and coordinate a research network for multi-, inter- and trans-disciplinary research on ocean governance in Europe. Focal thematic areas from the Ocean Governance network are reflected in the book-s content, including: land sea interactions, area-based management, seabed management, nutrition and food