From the back of the book:
Confrontation with a Relentless Foe
Finding themselves in the clutches of a halfling tribe that could mean a grisly end, the heroes must travel through more of Athas' uniquely terrifying lands to emerge at the gates of Tyr. Can they reach the safety of the city-state before the Wastewalker finds them to enact vengeance?
DARK SUN: Fury of the Wastewalker (Chapter 3) is designed for five characters of 3rd level and is the summer 2010 season of the D&D Encounters official play program. This DUNGEONS & DRAGONS adventure includes a full-color battle map, ready-to-play encounters, and DM information on the D&D Encounters official play program.