Shaddar-Nur Side Quest

Shaddar-Nur:

There is only one quest in this area and it can only be done after you have completed the first part of the Shaddar-Nur Main Quest, which the NPC plays a part in. When you first encounter the NPC as part of theShaddar-Nur quest he will say:

You will need to go clear the cellar of demons, and when you return he will be available to give you his Side Quest...

Glubba-Jar:

Glubba will give you to Black Book as part of the Main Quest and simultaneously ask you to do a Side Quest for him:

Escort him to the following location:

When you reach the bridge into Tristram Town (before the actual Quest Flag)  he will stop to reward you: