At the time of this novel, 2 main continents are known in this world. The world is commonly known as WyrdeHaven.
The smallest continent is Avalon, which includes Avalon itself and Takama ga Hara, as well as Tír na nÓg. The whole continent is basically considered a single country.
The other known continent is Wyrmheim, the bigger of the two, where Dracænaia, Ta’mery, The Principality, Hordelands and several smaller countries are.
The geography can be observed on the map.