The Vaults of El'Arad

Update for By Land? By Air? By Sea is in here. The update is a book on the third floor in the same room as the final named. Click on this book and the quest should update and your next step is to kill the named.

There's another quest for this zone given by an erudite on the isle of aversion. This quest requires you to collect book pages (i think 15) from various tables in the Vaults of El'Arad.