The Group of Twenty (G20) is the most crucial international institution of our times, which has been clouded by global economic crisis and gloom since 2008. From a basement existence as a low-profile gathering of finance ministers and central bank governors of major economies, it has grown into a hub for high political leadership to govern planetary economics. So pivotal is the world leaders’ level G20 for the future of the international system that the value of a full-length book on it cannot be overemphasised.