Given the question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. The Rivan Codex - The Rivan Codex is a collection of background material to the Belgariad and Malloreon fantasy saga by David and Leigh Eddings. It consists of two bodies of material used in writing the novels one for each series with three informal essays by David Eddings. Belgarath the Sorcerer and Polgara the Sorceress do not have dedicated sections but are referred to in the Eddings' discussions and drew on the material of the first ten books.
The answer is:
Written Work