When Napa Valley vintner Fred Schrader went looking for a winemaker in 2000, he hired a promising 29-year-old who was apprenticing at Turley Wine Cellars, known for Zinfandel and Petite Sirah. It was a gut-feeling hire for Schrader. The apprentice, it turned out, had never made Cabernet, and it is not his favorite wine. But the relationship evolved and has paid off handsomely for both Schrader and his winemaker, Thomas Rivers Brown. Wine Spectator's James Laube explains.