David N. Entwistle is a licensed psychologist and spent the first decade of his professional life providing psychotherapy in residential and outpatient settings. Since 1996 he has been on the faculty of Malone College in Canton, OH, where he has served as chair of the Psychology Department and has taught courses in the undergraduate psychology, graduate counseling, and graduate Christian ministries programs. In addition to teaching and writing, Entwistle conducts research on how patients cope with chronic medical conditions.