From the back of the book:
The Cycle Concludes
A ritual gone horribly awry leads to a pursuit through the warped Hornsaw Forest, where the Serpent Mother herself was torn asunder. With nothing but their own might and the assistance of some unlikely allies, the heroes must recover a lost treasure and somehow stop the machinations of Mormo's children, lest they resurrect the dread titan.
Usable alone, or as a part of the ongoing Serpent Amphora Cycle - which begins with "The Serpent Amphora," a free adventure available at www.swordsorcery.com - The Serpent Citadel is an adventure for characters of 6th -7th level.