The Book of Grudges, as all who know even a little of the Dwarves know, is the single tome containing every wrong the Dwarven Empire has yet to avenge. What even a little knowledge of their history would indicate is that no one tome could contain those Grudges with enough detail for those born long after those acts to avenge them. King Belegar was told to follow the High King, who told you to follow him, and the two of you walk out of the Hall and into a room that could be described as large were it not for the one you just left. Row after innumerable row of bookshelves of the Archives of the Karaz Ankor bridge the terse inventory of the Dammaz Kron with the exhaustive detail that would allow the Dwarves to know that vengeance has been done, and the room is a hive of busy activity, as a dozen venerable Longbeards each act as the center of their own swarms of younger disciples. As the High King orders the retrieval of the books on the Siege and Fall of Karak Eight Peaks, your eyes widen as you run your eyes over perfectly-preserved tomes of recorded history.
The Light Order do their best, but the Colleges have only been around for a fraction of the Empire's length, and before that a hundred tragedies each shaved away a record of history. The Great Library of Mordheim died with the city, the Sieges of Altdorf each resulted in a freezing populace burning books for heat, the Imperial Library suffered attrition every time the capital moved and was stolen back and forth a dozen times during the Age of the Three Emperors, and Dieter IV sold a good deal of what little survived to reach him to anyone willing to pay. And if that wasn't enough of a reason for his soul to be damned, when he sold Marienburg its independence, it took the Great Library of Verena with it, and ever since the self-righteous custodians have delighted in denying entry to citizens of the Empire. The Vaults of the Great Cathedral of Sigmar are purged every time a more conservative Grand Theogonist takes office, and there's Witch Hunters out there who consider literacy to be compelling evidence of witchcraft, and even when some poor scholar escapes the pyre it's not always guaranteed their books will.
A hundred hundred roadblocks between the average human and their past, but since the first founding of Karaz-a-Karak, every single event to ever befall the Dwarves has been carefully recorded and remains right here, carefully preserved by rune and artifice.
