Book excerpt: These days, there's no better business tool than a book. But most people don't know how to write one-or even where to start. Turns out the best place is the messy middle.Anna David knows this more than anyone. When the New York Times bestselling author of seven books got sober and sold a book about her recovery to the biggest publisher in the world, she thought she'd made it. Then she learned the hard way that trying to make a living by selling books to traditional publishers was a cruel joke-and that accepting the unacceptable was no way to live. The publishing industry was ripe for disrupting. But first David had to make a mess and then learn from it.After years of struggle and self-discovery, she ended up not only mentoring and publishing hundreds of bestselling authors but also thriving personally and professionally. Now she's sharing what she's learned-and showing others how to do the same.In this page-turning and useful memoir-meets-manual, David reveals her personal lows (doing cocaine by herself while contemplating suicide), her career lows (a past-his-prime celebrity hurling a phone at her as she wrote his biography) and how her life today wouldn't be possible without those experiences.With deft humor and unique insight, David demonstrates how much early childhood programming can set us up to repeat our own dysfunctional patterns-until we're ready to shift our behavior. The last quarter of the book is a practical guide so that readers can make their own mess into a message-and memoir.