Spice and Wolf Novel Volume 8 is written by Isuna Hasekura.

Hearing rumors of a "leg bone of the wolf" being used as an artifact of the Church to showcase its power, Lawrence and Holo head to the site to gather more information. Holo can't just turn away from what might be a relic of her own kind, after all. Of course, upon arrival, the travelers find that the town is the center of a giant trade dispute! Seems that Col will be getting a lesson in microeconomics!