 Newly minted vice presidential nominee J.D. Vance built his speech to the Republican National Convention around his own Appalachian roots. But it wasn't the first time he had shared his personal story. Long before he was a U.S. senator from Ohio, Vance rose to prominence on the wings of Hillbilly Elegy, a best-selling memoir that many thought captured the essence of Donald Trump's political resonance in a rural white America ravaged by joblessness, opioid addiction, and poverty.