Eric Jaffe tells the history of the 400-plus-year-old Boston Post Road, connecting New York City and Boston. The King’s Best Highway: The Lost History of the Boston Post Road, the Route that Made America, details the road’s essential role in the political, economic, and social development of the United States. Continuously raised, improved, rerouted, and rebuilt, the road influenced the advent of newspapers, stagecoach travel, textiles, mass-produced goods, commuter railroads, and even Manhattan’s modern grid.