The Firm: The Story of McKinsey and Its Secret Influence on American Business Book review by Deane Barker • October 23, 2016 • tags: business • Book Info Author Duff McDonald Year 2013 Pages 400 Acquired June 18, 2022 I have read this book. According to my records, I completed it on October 23, 2016. A hardcover copy of this book is currently in my home library.