Spice and Wolf Novel Volume 5 is written by Isuna Hasekura.

Lawrence and Holo take a respite from their travels north, but a true businessman never rests! It isn't long before an opportunity for profit in the town of Lenos presents itself to Lawrence; one that could fulfill his dreams of owning his own establishment. But as always the promise of great reward carries with it great risk - and risk is never greater than when one plans to use a werewolf as collateral!