Koguma's Guide to the Multiverse

A series of texts titled "The Guide to the Multiverse" was authored by Koguma, also known as the Chronicler. The series was published in several editions, constantly being updated over the course of Duniyan history. Copies have been found scattered throughout Duniya as well as the outer realms of The Elemental Chaos and The Astral Sea. The nature of Koguma is unclear and it is unknown how they are capable of gathering all the first hand information they cite for their research.