Looks at how people use maps and GPS to find their way around, including details about routes, landmarks, and sites.

Before Washington crossed the Delaware, Henry Knox crossed Massachusetts in winter-with 59 cannons in tow. In 1775 in the dead of winter, a bookseller named Henry Knox dragged 59 cannons from Fort Ticonderoga to Boston-225 miles of lakes, forest, mountains, and few roads. It was a feat of remarkable ingenuity and determination and one of the most remarkable stories of the revolutionary war. In Henry and the Cannons the perils and adventure of his...