In 1998 David and Leigh Eddings wrote a new book: The Rivan Codex, basically an appendix to both The Belgariad and The Malloreon.
It's divided into several parts.
- The Holy Books (of the diverse gods)
- The Histories (of the assorted lands)
- The Battle of Vo Mimbre
- Preliminary studies to The Malloreon
- The Malloreon Gospels
- A Summary of Current Events
In this book there isn't a lot of Character Building but it's certainly fun to read and a big help in understanding the world in which a young farmhand named Garion became Overlord of the Western Lands.