In the monthly writing workshop I conduct at a local library, the other night I talked about Write Your Novel From the Middle by James Scott Bell. The concept is described as “like popping open the hood and showing writers how they can be intentional about the story.”
In this book, Bell claims that for a book to be effective, there must be a “mirror moment” where the main character can literally or figuratively look in the mirror and questions his/her beliefs about himself. It helps enormously to know the middle moment/mirror moment, because knowing this moment “illuminates the entire book” you’re trying to write. It’s the “deep tissue of the story,” (or the engine that drives it.) which many writers don’t discover until much later, sometimes after several drafts or even once the book is published.