One morning while reading Barron's, Kara Newman took note of a casual bit of advice offered by famed commodities trader Jim Rogers. "Buy breakfast," he told investors, referring to the increasing value of pork belly and frozen orange juice futures. The statement inspired Newman to take a closer look at agricultural commodities, from the iconic pork belly to the obscure peppercorn and nutmeg. The results of her investigation, recorded in this fascinating history, show how contracts listed on the Chicago Mercantile Exchange can read like a menu and how market behavior can dictate global...