From publisher blurb:
A trickster fiend from beyond the Infinite Horizon summons the party into a dangerous and magical dwelling. Within the House of Doors are terrible and challenging battles, one after another, drawn from the minds of the party themselves. Every bard's song, every storied adventure, every tale of hard won victory picked up in taverns and roadside campfires has been lovingly recreated within the House of Doors. Like all of its kind, the trickster has given the party a way out. If they can solve the riddle, open the correct doors, and defeat their inner fears, the passage out will open. But will the fiend allow them to leave the House of Doors without a final demonstration of their talent?
Can your players find a way out of the HOUSE OF DOORS?