Black Sigil Strange Wall

how can i get pass the strange wall at the Ring of Memories sealed area?
Post Merge: [time]1244824122[/time]
nevermind about the wall this time im trying to find a book that can help me open it anyone knows how to get it?

 

You can't get past it until you proceed to do the other quest.

 

and that would be?

 

Wouldn't know Not up to that part yet

 

i thought so cause its part of the main quest.
Post Merge: [time]1244891728[/time]
nevermind found the book.