Inspired by the mystique of a uniquely American tree, the pecan, Oklahoma writer John Gifford set out to explore the US pecan industry, which provides 80 percent of the world's supply of this special tree nut. What he discovered during his two-year immersion was a nut--one that's suprisingly symbolic of America itself--that's poised to become the next superfood and an industry that today finds itself in the most important juncture in its history...