The Nine Worlds (The Weirkey Chronicles)

The story takes place across a group of nine clustered worlds. Much information is still unknown about them, but this page will gather what is known. There are more references in the current chapters that I didn't track down.

The Nine Worlds
 * Ichil: Dark and cold. Fiyu's home world.
 * Deuxan: Oddly metallic, with an aggressive culture. Primary setting of the second book.
 * Tatian: A warm farmland. Primary setting of the first book. Nauda's home world.
 * Arbai: A dry wasteland world occupied by philosopher golems. Navim's home world.
 * Fithe: A war-like world split between realms of land and water.
 * Slest: Not yet seen, only referenced as dangerous.
 * Siata: Not yet seen. Its inhabitants are supposed to be unusual among the Nine.
 * Aathal: A forested world of sentient trees and deadly plants.
 * Noven: Bright, with nine suns and many-winged inhabitants. One of Theo's original companions was from here.

Worlds Outside the Nine
 * Earth: This appears to be our planet. Theo and Magnafaor are from there.
 * Cleansed Lands: The mysterious world seen only in the prologue.
 * Chasm of Lamentations: A roving fragment of a world that temporarily links to others.
 * Unknown Eldritch World: The leader and some members of the House of the Lost are implied to be from outside the Nine. They bear at least some resemblance to Lovecraftian horrors.
 * Demon Realm: Demons aren't from any of the Nine, but it remains to be seen if they have a home world.