The Codex contains a variety of information about Aeldos.
Atlas: Maps and geographic information.
Bestiary: Index of beasts, monsters, and creatures.
Cultures: Index of Aeldan nations.
Factions: Index of transcultural organizations and groups.
History: The general history of Aeldos organized by age.
Mythology: The transcultural mythology of the One and the Ten.
Personae: Index of known or notable Aeldan individuals.
Religion: Index of religions and cults.
Technology: Index of technologies and inventory of gear.
Arcana: Index of the arcane including the Linguas.