The Theft of the Virgin

When Paul Zacher finds a genuine old master's painting hanging in an exhibit of great fakes, it can only mean one thing: the fake must be hanging in place of the real one he's seeing. Is this a new way of transporting stolen masterworks? And who was skilled enough to paint that copy?
This ninth of the San Miguel mysteries puts Paul on the trail of a world-class forger. When that trail crosses the route of the Virgin of Guadalupe as it tours México, the ante is boosted to murderous levels. As the action swings from Florence, to Texas to Guadalajara and San Miguel, the question becomes, what is Paul Zacher really looking at?