In short, consider this Maegard's Bible.
Veritatem, meaning "the truth", is the documented creation story and subsequent tales of when the Ten graced the earth. Recorded by the Muse Clio, this segment is comprised of six parts, detailing the birth and destruction of the gods from which the reigning royal families are thought to descend from.
It is believed that parts IV and V have been withheld by the High Council, and few full copies of Veritatem lie outside of high-born, gentry hands. It is believed that Clio's original copy - with whom it likely lies - is over a thousand pages long, detailing not only the stories of the gods, but the full history and ages of Maegard as seen from the eyes of one of Maegard's most renowned immortals.