Joan of Arc is the number one book that Mark Twain ever wrote, according to him. He said he got seven times more joy out of it than any other and it's called Joan of Arc. At age 17, she was a 17 year old girl in 15th century France. She led them into battle and they expelled the English after 100 years. If she could do that then, we as leaders can inspire people to do things that they don't believe they can do.