The geographic constructs and the geo-political imaginations have dictated the formation of informal dialogue mechanisms and multilateral structures. During Cold War, the power bloc politics have subsumed these geographical definitions and have transcended national sovereign boundaries. In the contemporary discourse, new formulations like Asia-Pacific, East Asia and Indian Ocean have defined new politico-security thinking. The concept of Indo-Pacific is an over-arching geopolitical imagination which addresses new challenges in political, economic and maritime domains. This book addresses this new concept and debates its viability.