Did anyone else read the book in the Tiefling hideout and think something of it?

It speaks about two sisters, one, a cleric, who wanted to control the powers of an elder brain. According to the book the Elder Brain killed both, but it got me thinking all the same.


I don't think it's there just for shits n giggles, if it is an actual reference/clue to something that did happen. The mural at the grove also set me thinking (given, I'm not the most versed in lore so it might be some other thing that happened and I have no idea about).




well