Midnight Harvest (Saint-Germain series Book 16)

In Chelsea Quinn Yarbro's Midnight Harvest, Worsening military situations in Spain compel Saint-Germain to leave Europe; he and Roger travel to Boston, then Chicago, and finally to California, unaware that a paid assassin is following them. Saint-Germain visits the Pietragnelli winery and discovers how much the Great Depression has affected life in the USA; difficulties with Pietragnelli's neighbors escalate, becoming more violent and demanding to the point that Saint-Germain helps Carlo Pietragnelli take a stand against the culprits. He also reunites romantically with Rowena Saxon, now living in San Francisco.