Dr. Margaret Rukstalis is an addiction psychiatrist who has studied the brain and behavior change for over twenty-five years. She received her MD at Dartmouth Medical School, is currently on faculty at Wake Forest School of Medicine, and has coauthored more than fifty scientific articles and book chapters. She lives in North Carolina.
A. J. Gregory is the author of Messy Faith and Silent Savior. She has also partnered with high-profile figures on over thirty-five memoirs and self-help books, some New York Times bestsellers. She lives in New Jersey.