Acknowledging that governance relies not only on formal rules and institutions but to a significant degree also on informal practices and arrangements, this unique Handbook examines and analyzes a wide variety of theoretical, conceptual and normative perspectives on informal governance. The insights arising from this focus on informal governance are discussed from various disciplinary perspectives, within different policy domains, and in a number of regional and global contexts. This Handbook is an important contribution that will put informal governance firmly on the map of academic scholarship with its review of the range of the different uses and effects of informal arrangements across the globe. Bringing together multidisciplinary contributions on informal governance arrangements, this Handbook will appeal to postgraduate students in political science and scholars within the field of political science and global governance.