Book excerpt: Polk's Folly is William Polk's captivating investigation of his impressive family tree and of the broader American tale it narrates. Growing up in Texas in the late 1930s, listening to his grandmother's memories of her childhood amidst the Civil War, Polk became fascinated by tales of his family's engagement in monumental moments of our nation's history. Beginning when Robert Pollok fled Ireland in the 1680s, Polk's saga includes an Indian trader, an early drafter of the Declaration of Independence, one of our greatest presidents, heroes and rascals on both sides of the Civil War, Indian fighters, a World War I diplomat, and Polk's own brother, a journalist who reported on the Nuremberg Trials. Full of stunning detail and based on primary historical documents, Polk's Folly is a grand American chronicle that allows history to include the lives that made it happen.