This collection examines change within the major regional organisations of the Asia Pacific: The Asian Development Bank (ADB), the Association of Southeast Asian Nations (ASEAN), Asia Pacific Economic Cooperation (APEC) and the ASEAN Regional Forum (ARF). It has two simultaneous foci: the nature of institutional change in regional organisations, and the process of regionalism in the Asia Pacific. It combines the views of both officials and practitioners, providing new insights into both its major questions.