The demon army of Tanglebriar is on the march, bringing death and terror to the elven nation of Kyonin. Can a group of heroes complete a desperate mission deep behind enemy lines to stop sinister forces from completing a secret weapon before the demon Treerazer can use it to win the war?

The Secret of Deathstalk Tower is a Pathfinder adventure for four 14th-level characters. This adventure continues the Spore War Adventure Path, a three-part monthly campaign in which a group of adventurers aid the elves in a war against an army of demons. This adventure also includes an article about the demon lord Treerazer (the primary antagonist of this campaign), an exploration of the sinister ooze monsters known as blights, powerful new magic items to aid heroes against their foes, and several sinister new monsters.

Each monthly full-color softcover Pathfinder Adventure Path volume contains an in-depth adventure scenario, stats for several new monsters, and support articles meant to give Game Masters additional material to expand their campaign.