Definition
What is an authority book?
An authority book, as Authority Book Guide uses the term, is a nonfiction book written by an expert to show what they know and how they help people. Its main job is credibility, not bestseller sales.
It gives prospects, event organizers, podcast hosts, and journalists a concrete way to judge your expertise before they meet you. It also becomes the source for your content: chapter topics, client success stories, and how-to steps turn into posts, talks, and interview talking points.
Big Impact Books, which publishes this guide, describes the goal for its authors as a book that builds authority, opens doors, and supports their next business move.