What is the setting of The Tiger's Wife: A Novel by Tea Obreht?

The setting of the narrative moves across both time (i.e. spanning several decades of the early 20th Century and into the more recent years of the 21st) and, to a lesser degree, across place (from village to city to countryside and back again). The most important thing to note about the book's setting, however, is the part of the world in which it takes place (i.e. the geo-political boundaries of the land in which all these villages and cities and countrysides are found).