Spice and Wolf Novel Volume 10 is written by Isuna Hasekura.

After the turmoil in Kerube, Lawrence and his companions make for the Kingdom of Winfiel across the sea. Their destination is the great abbey of Brondel, said to hold the wolf bones they seek. Arriving in the kingdom, they hear tell that the abbey, normally prosperous due to its great wool trade, has fallen into a financial crisis. Worse, the most powerful economic force in the world - the Ruvik Alliance - is entering the kingdom with its eye upon the abbey's land holdings...