Since you’re an author, writing articles should be second nature for you. The more articles you get published the higher your stock as an author becomes. It goes without saying, your articles should relate to your book.
What you might want to do is plan out 20 articles by outlining what order you want to direct your reading audience. Remember to add a bit of intrigue to your articles to ensure that your audience will follow through and go to your website and buy your book.