DC: someone knows what is BOOK OF KATANA2

[morgado]

I found an item called BOOK OF KATANA2 and I know that are more two in the game.
What I can do with those items.

[VulpesMundi]

Besides look at them, nothing. They have no practical in-game use. Holding and viewing the three Book of Katanas and going through the quest Seek My Master simply helps to reveal which AUW Agito is the real Orochiagito.