The term 'AUTHOR SECRET' can be solved by the 11-letter word 'GHOSTWRITER'. A ghostwriter is someone who writes a book, article, or other written work for another person who is credited as the author. Ghostwriters are often used to write books, speeches, and other works for celebrities, politicians, and other public figures. Ghostwriters are also used to write articles, blog posts, and other content for businesses and organizations. Ghostwriters are typically paid for their services, but the exact terms of the arrangement vary from project to project.