"The Sandstone" is the third novel in the Sorcet Chronicles series. Sorcet and Tachi, joined by Tachi's sylphen friend Leafe Willowsdottor and the droichen Dag, set out to close a portal located in the hostile and arid Eastern Desert. To complicate matters, the portal contains the radioactive makings of a "dirty" bomb and Sorcet is also charged with supervising a spoiled desert sylphen who is in line to succeed the local tribal chief. The climactic battle brings both great joy and great sorrow.