One of the first missions of the dwarves that asks to interact with an NPC in order to acquire a book that we must read or deliver to another NPC but when we look for said NPC, it does not appear anywhere in the area that it indicates.
Find Timili Sorinsson's book lying on a bench nearby. Read the book to receive a tome entry detailing the contents of one of its passages. Return to Snorri Oathbrew after you are successful.
