Goblin Slayer, Vol. 5 (light novel) — Kumo Kagyu

A young noblewoman has disappeared while out on a goblin hunting quest. When Goblin Slayer and his part set out to find her, they are stunned to discover a horde of goblins have built their nest within an ancient dwarven fortress...and these ones even appear to be followers of some primitive, sadistic cult! But what troubles Goblin Slayer most of all is their leader, who is stronger and more intelligent than any goblin he's faced before...