I wrote this eBook several years ago. However, I have recently updated it. There are now two versions: one for fiction and one for non-fiction. You can purchase and download either—or both!
These eBooks are designed to help you communicate your basic book idea in a way that has the best chance of getting the most attention. It also walks you through real-world examples.
I would also suggest that you also read my article, Advice to First-Time Authors. If you met with me one-on-one, this is what I would tell you.