9 Secrets of Ghostwriters

(via mental_floss)  Admit it: You’ve read at least one book written by a celebrity, politician, or business tycoon in the past year, if not the past month. You’re no fool, though. You know that celebrities often have help writing their memoirs. But what exactly does ghostwriting a book for someone else entail? How much of the book does the ghostwriter write and how much does the “author” contribute?