This is a West Marches style adventure called by Rahl (@Caesun). Details are below:

Something has been stolen from Rahl’s Lair.

The party will travel to Rahl’s Lair, meet with Smoke, the kobold commander left to guard the site and learn what was taken. From there, the party will track down the thieves, recover the Book of 100 Demon Names, and determine what demon the culprits intended to summon and why.

THREE GOALS

Meet with Smoke, Rahl’s Kobold Commander, and get a full account of what happened (anything else stolen)

Track down the thieves and recover the Book of Demon Names,

Discover what demon they were attempting to summon and why