The novel "Mixed Blood" is set in the Chaos Continent. It is one big landmass with the Lost Land in the middle where there is a pillar of light.
There are three great human empires in the Chaos Continent: the Bright, Moonlight, and Star Empires.
The Bright Empire is the strongest. Its area of influence is medium-sized. The whole country, including the emperor, believe in the God of Light, so the Temple of Light is very powerful there.
The Moon Empire is the smallest and weakest. It lies in the East of the Chaos Continent and is often invaded by the beastkin.
The Star Empire is vast but the government is divided into several factions and the most powerful person there is not the emperor but the prime minister.
Underneath the Chaos Continent is the Reverse Side where the undead and demons live.
While the Chaos Continent is a lively place, its Reverse Side is a barren, harsh land where hardly any plants or animals can survive.