The Thraedli Dawn Codex is tome of history on the Dawn Era, Creation War and the primordials. It is very one-sided with the writers unanimously siding with the primordials and against most actions of the Creationists and their Nawirrûs Covenant defenders. Outside of this bias, this huge tome sized for eldritch giants is an amazing source on the thinkings of the primordials, their abilities, and other facets of their lives.
The magical property of the book is that it is a Book of Endless Pages. Some of the contributors to the book say that it is cursed with only those strong in will capable of pulling away from its writing; with those failing to break perishing from exhaustion, thirst or starvation.