Start with one sentence that names the subject and central value of the book. Follow with the main progression: what readers encounter, how the chapters develop the idea and what makes the author’s perspective distinctive. Avoid listing every chapter detail or using vague superlatives.
A synopsis for an editor or publisher may include the ending and full structure, while public-facing copy should focus on reader interest and benefits. Label the intended use, respect its word limit and revise it after the manuscript is stable so the description matches the finished book.