Book excerpt: In the age of urban geopolitics, in cooperation with the major city networks and initiatives, interconnected coastal cities lead towards a more resilient sustainable future. This book raises global awareness on the challenges and opportunities for coastal cities and the myriad of issues and stakeholders which impact them. The book offers a panoramic integrated view of the most critical urban coastal sustainability issues shaping the urban horizon of the future. Drawing on the most authoritative studies and asking further questions, the book embraces issues of smart, sustainable and inclusive blue green growth, active social integration, environmental conscience and resilience, food, energy and resource security, exploration and protection of the global ocean, ecosystem-based urban coastal planning and policy and progress in education and science, culture and the arts, coastal urban renaissance and accountable multi-layered governance. From large global ports to small tourism and fishing resorts, sustainable development calls for coastal cities to improve their functions. Coastal cities need to adopt ecosystem-based approaches to manage the land-sea continuum, invest in blue green energy and mobility, attract responsible business investment, and honour the sea as a source of infinite innovation and culture.