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.