Spice and Wolf Novel Volume 15 is written by Isuna Hasekura.

The Myuri mercenary band - a troop named for one of Holo's old comrades. In order to find them, Lawrence and company make for Lesko, a town dominated by the copper-trading Debau Company. Rumors of the Debau Company's schemes to both open more mines and seize control of the northern lands swirl, along with rumors that they're concentrating military power in the town in preparation. But when Lawrence and Holo arrive in Lesko, they discover a surprisingly cheerful and peaceful place. What is really happening?