The authors are clearly scholars in their field of psychology and speak intelligently about a wide range of psychological concepts. However, their style remains conversational and easy to understand; it is not written in such a way that it seems “over your head”. Their personal stories are sometimes funny, often relatable, and completely helpful. Their collaboration on this book sparked an interest in reading other books written by McCullough, Sandage, and Worthington. Michael McCullough, Ph. D., is a psychologist and author. He served as director of research for the National Institute for Healthcare Research (NIHR) in Rockville, Maryland. He is director of a Laboratory of Human Evolution and Behavior and professor of Psychology at the University of Miami. He wrote: Beyond Revenge: The Evolution of the Forgiveness Instinct, Forgiving is Human: How to Put Your Past on the Back burner