Matthew McKay, PhD, is a professor at the Wright Institute in Berkeley, CA. He has authored and coauthored numerous books, including The Dialectical Behavior Therapy Skills Workbook, The Relaxation and Stress Reduction Workbook, Self-Esteem, Thoughts and Feelings, When Anger Hurts, and ACT on Life Not on Anger. McKay received his PhD in clinical psychology from the California School of Professional Psychology, and specializes in the cognitive behavioral treatment of anxiety and depression. Jeffrey C. Wood, PsyD, lives and works in Las Vegas, NV. He specializes in brief therapy treatments for depression, anxiety, and trauma. He also provides coaching for spiritual development, communication skills development, and life-skills coaching. He is coauthor of The New Happiness, The Dialectical Behavior Therapy Skills Workbook, The Dialectical Behavior Therapy Diary, The Cognitive Behavioral Therapy Workbook for Personality Disorders, and Getting Help.