Omniscient Book

 is a weapon in SINoALICE.

Weapon Story
There once was a boy who lamented being exploited.

When his honest and hard-working parents died due to the carelessness of their feudal lord, he sought to make the world a more just place.

Then one day, a man appeared before the boy and gave him a tome of infinite knowledge. Unable to read a page of it, the boy committed himself to his studies. There was soon not a single word he didn't understand.

But he still had much to learn.

While he could read the tome, he failed to understand it. In time, the boy grew to adulthood, took a wife, and had a family of his own.

It was then that he finally understood the tome.

His infinite knowledge plunged him into infinite despair. For he finally understood the truth: No matter how hard they might try, the world would never be just.