When Oklahoma! Opened, it instantly made musical theatre history. It was a daring ahead-of-its-time piece of dazzlingly inventive theatre that exploded every myth about what constitutes a successful musical. “Ok! The Story of Oklahoma!: A Celebration of America's Most Loved Musical” celebrates this watershed work that has taken its place in the pantheon of American musical theatre. Paperback. This item may require additional shipping time due to availability.