The Chromatic Chord
The Writers’ Guide to the Decachord

Book 1
Foundations
The ground every era of Caeldon stands on: the cosmos, the powers, the laws of magic, the peoples as kinds, and the deep past.

Book 2
The Medieval Era
Caeldon around 1,350 CR: its two halves and the one crossing between them, its peoples and powers, an atlas region by region, and how its present was made.

Book 3
A Bestiary of Caeldon
The beings of the world that are not peoples: the animals, plants, and fungi of Caeldon, the natives of the planes and zones, the hosts of the Dark Entities, constructs, the risen dead, and the beasts a zone or magic has touched.
Companion
The Reference
A wiki of Caeldon built from the same technical pages: every power, plane, people, place, faith, spell, creature, and age, with links to the chapters of the books that tell it.