The Merchant's Mark

In the third installment of the Gil Cunningham murder mystery series set in Medieval Glasgow, a shipment of books leads to a gruesome discovery involving treasure and a severed head. When Gil's acquaintance, merchant Augie Morison, is accused of murder, Gil teams up with his friend and future father-in-law to uncover the truth. Their investigation takes them across historical locations, uncovering further danger along the way.