The hardest part of a writer's job is sitting down to do the work. Writing happens in three phases.
Your book could have helped people, brought beauty or wisdom into the world, if only your book came to be. Or worse, you wrote a book, but nobody cared about it.
Producing a work that sells is not just about writing what you think will work. It's about finding an idea that will excite you and your audience. You have to write a book that is worthy of being sold. To maximize your chance of finishing your book, you need a proven plan.