"Ian Purkayastha is New York City's leading truffle importer and boasts a devoted clientele of top chefs nationwide, including Jean-Georges Vongerichten, David Chang, Sean Brock, and David Bouley. But before he was purveying the world's most expensive fungus to the country's most esteemed chefs, Ian was just a food-obsessed teenager in rural Arkansas--a misfit with a peculiar fascination for rare and exotic ingredients. The son of an Indian immigrant...