Description
The spellbook?... Yes, it seems to be Corthana's. I'm sure of it... And yes, I guess that means you should take it back to Meridian. I hate to admit it, but it's not safe here, and General Catari needs to see it.
I'd love to get my hands on it again some day and unlock more of its secrets! But for now: take it.
Upon completion
You found the spellbook! And Uriel confirmed it's Corthana's?
I'm not surprised to hear she didn't want to give it up. That young Bahmi has a fascination with death that sometimes makes me worry about her. But, she's peerless in her understanding. I've just asked Faceless Man to keep a close eye on her.