The Tower of Nerek (Descent: Legends of the Dark #4)

Staggering fantasy adventure in the epic world of Descent: Legends of the Dark when a holy warrior and a legendary hero fight save a city from a demonic evil that threatens all of Terrinoth

Nerekhall: a city of paranoia and fear, where the harsh and unbending rule of law is enforced by unfeeling automata called the Ironbound. Drawn to the city by recurring nightmares, Andira Runehand and her companion, Trenloe the Strong, soon find themselves caught up in a sinister plot and unable to escape. Both have different ideas about what it means to be a hero, and both must learn to trust the other. For in secret, an uneasy alliance concocts a dark plan in the city’s infamous tower to open a portal and summon a demonic power, the likes of which has never set foot in Terrinoth.