The Thirteenth Vessel is the first Uncanny Agency gamebook, designed as the first release in The Threshold Trilogy. All Uncanny Agency gamebooks are designed to be played as a stand-alone, but each is within a world.
The time is now. The world is as we know it… mostly. The difference is that you and your colleagues know something that most people don’t; that our universe is under constant threat from indescribable horrors in another dimension. These unknown terrors are malevolent and powerful, determined to transform our world into a gruesome hellscape.
Written by Sean Cooper and illustrated by Leigh Chalker, The Thirteenth Vessel is a pulse-pounding race against the clock to save the world from an unimaginable horror.
The Thirteenth Vessel is scheduled for release in June 2026
Uncanny Agency Gamebooks 