From the back cover:
Windriders of the Jagged Cliffs details the lives of the rhul-thaun - the descendants of the rhulisti and the keepers of ancient knowledge who practice the most unusual and arcane art under the crimson sun: the shaping of life itself.
This 128-page accessory for players and Dungeon Masters alike is the first in the "Wanderer's Chronicle" series that explores new areas of Athas. It features:
* Details of the Jagged Cliffs region, the rugged land that lies between Tyr and the Kreen Empire.
* Living tools left from Athas's dim past, including organic weapons, armor, and flying vehicles.
* Secrets of the swamp at the base of the Cliffs, and its link to all magic within the world of Athas.
* Details for creating these unique halfling characters, and rules for making and using living weapons.
* A complete adventure for existing PCs or newly created rhul-thaun characters.