From the book cover:
The Vintage Caper begins high above Los Angeles with a world-class heist at the impressive wine cellar of lawyer Danny Roth. enter Sam Levitt, former lawyer and wine connoisseur who follows leads to Bordeaux and Provence.
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Peter Mayle also wrote A Year in Provence which is an autobiographical story of his life in Provence (it was made into a movie starring John Thaw).