The American Flag, USA, Books of American Wisdom, Hardback This handsome guide to the American flag is a concise collection of the history and etiquette of the U.S. flag in an elegant hardcover edition. The book includes details of the laws relating to the U.S. flag as described in the United States Code, information about the Pledge of Allegiance and Flag Day, a guide to flag presentation and care, and a timeline of flag history–noting the date each state was added to the union.