The book has sold approximately 140–200 million copies worldwide, making it one of the best-selling books in history, second only to the Bible. The Little Prince is not a fairy tale for children, but a coming-of-age gift written for all adults who "were once children." It is only a few tens of thousands of words long, yet it hangs quietly in your heart like a small planet, clean and shining. The little prince whom the pilot meets in the desert stands only knee-high, yet he carries the loneliness and tenderness of the entire universe. He asks, "Will you tame me?" Crying, he says, "I love my rose, and I am responsible for her." He travels across six planets, seeing adults full of self-importance, and finally tells you in the gentlest voice: What is truly important is invisible to the naked eye.