Following on from where 2004's three-volume collection ''Diplomacy'' (ed. by Jonsson & Langhorne) left off, this new four-volume major work takes a new look at a subject which has matured and developed significantly over the past decade. The collection has been carefully structured so that each volume gives the reader an overview of the literature on a new area of development in the study of diplomacy. Volume 1: Diplomatic Institutions. Volume 2: Diplomacy in a Multicultural World. Volume 3: The Pluralisation of Diplomacy - Changing Actors, Developing Arenas and New Issues. Volume 4: Public Diplomacy.