The Book of Knowledge : War of the royalties

The Book of Knowledge: an artifact that is said to hold all there is to know about this world. Such an unfathomable object had been obtained by a man who is once a second prince of a certain country, now known as the Book Keeper. Seeking him out, is the daughter of the Keeper's brother, the late king, in order to bring an end to the civil war that had begun by her own brother as a bid for the throne. Knowing how it all will end before it even began, the Book Keeper joins the Princess on her journey, guiding her down towards the end of her path whether she likes it or not.