For example:
* Charles Darwin: He wrote "On the Origin of Species"
* Charles Dickens: He wrote many books, including "A Tale of Two Cities" and "Great Expectations"
* Charles de Gaulle: He wrote "War Memoirs"
* Prince Charles: He has written several books, including "Harmony: A New Way of Looking at Our World"
Please provide more information so I can help you identify the correct Charles and his book!