Oxford University Press has recently published The Oxford Handbook of the International Relations of Asia, edited by Saadia Pekkanen, John Ravenhill, and Rosemary Foot.
The volume includes thirty-nine chapters, which cover all aspects of the international relations in the region.
For folks who have access to the online series of Oxford handbooks, this volume is available here. Or skim excerpts on Google Books.
I have a chapter in this volume on territorial and maritime boundary disputes in East Asia, which I will discuss in a different post.