The Realm of Joroin
An arcane ritual book
This spellbook, or ritual book, is a compilation of the rituals used to create the magic defenses that protected the City of Argent.
Multiple factions are currently looking for the tome in hopes to either protect it or abuse the lore it contains.
Its last known location is the Tomb of the First Dragonborn, which was recently discovered to be in the River Graveyard.