This textbook provides a comprehensive examination of international economic law amidst the rapidly evolving dynamics of global economic governance. It highlights how geopolitical tensions and global economic fluctuations, including those in stock markets, are prompting shifts towards localized strategies, the formation of geo-economic blocs, and an increasing divide between the Global North and South. The advent of generative AI is notably expanding its applications, heralding significant changes and challenges for both businesses and policymakers. This edition focuses on real-world scenarios and the latest legal developments, emphasizing practical application beyond theoretical analysis. The book provides a comprehensive examination of the core principles of international economic law and explores critical business issues such as internet governance, sovereign debt, state capitalism, and international tax reform. It also addresses significant public policy areas including economic migration, water services, health regulation, and the protection of public morality within the framework of international economic law. Now in its third edition, this textbook has received acclaim from both experts and students over the last decade for its thorough investigation of tangible issues. It offers deep insights into the implementation and adaptation of international economic law to the dynamic forces of economic globalisation. By equipping students, scholars, and professionals with essential knowledge, the book prepares them to navigate the complex legal dimensions of our globalised economic system.