We invited scholars and practitioners to examine the management of power transition in the Asia-Pacific. This matters now for two reasons. First is the potential for new policy directions in the pivotal regional powers under the leaderships of Donald Trump, Xi Jinping and Shinzo Abe, as well as other regional actors such as the Philippines under Rodrigo Duterte. Second, are the increasingly prominent 'Grey Zone' activities that are shaping regional perceptions. Such Grey Zone activities may be considered as more than normal competition between states but less than war, coupled with the use of multiple elements of national power to pursue national security objectives. How might such 'Grey Zone' activities—involving media, economic, ambiguous military forces or island building—be managed to deter or control escalation? On the other side of the coin, what is the current condition of trust and cooperation between key actors in the Asia-Pacific and what new possibilities exist to manage trust and distrust?