The Secrets of Iriestine's Order

From the publishers blurb: Deep in the heart of the forest, there is rumour of an underground temple forgotten by the ages, built for a god long dead. You have been tasked by a small town with trying to find out if there is any merit to the rumblings of the temple reawakening and followers flocking to it. Do you and your party have what it takes to delve inside the deepest recesses of the inescapable dungeon?