quest help

Been getting a shit ton of questions about quests that require bit more explanation, so started working on a guide for y'all: the guide Will add to it in the next days, but maybe it's already of some use to some! - Avi Edit; includes the most annoying custom quests, some event quests, a...

I'm currently doing Chapter 30 Episode 10: The enemy is near! Where does one find the Powerful Manuscript? The quest merely says it's in diamond shores, the flavor text at the bottom say something about the Ayanad Library, which to my understanding got replaced by the Abyssal Library instance...