Henry Cloud is an American self help author. Cloud co-authored Boundaries: When to Say Yes, How to Say No to Take Control of Your Life in 1992 which sold two million copies and evolved into a five-part series. Henry Cloud is president of Cloud-Townsend Resources, he has a BS in psychology with honours from Southern Methodist University and a PhD in clinical psychology from Biola University (1987). He also took classes from Talbot Theological Seminary.