Book excerpt: From New York Times bestselling author David McCullough, a special ebook boxed set features books that study key points of American history. The David McCullough Great Moments in History ebook box set includes the following McCullough classics: 1776 is the riveting story of George Washington, the men who marched with him, and their British foes in the momentous year of American independence. The Johnstown Flood is the classic history of an American tragedy that became a scandal in the age of the Robber Barons, the preventable flood that destroyed a town and killed 2,000 people. Path Between the Seas is the epic National Book Award–winning history of the heroic successes, tragic failures, and astonishing engineering and medical feats that made the Panama Canal possible. The Great Bridge is the remarkable, enthralling story of the planning and construction of the Brooklyn Bridge, which linked two great cities and epitomized American optimism, skill, and determination. A special bonus is included: The Course of Human Events. In this Jefferson Lecture in the Humanities, David McCullough draws on his personal experience as a historian to acknowledge the crucial importance of writing in history’s enduring impact and influence, and he affirms the significance of history in teaching us about human nature through the ages.