David Harp, MA, is president of Musical iPress, a music instruction publishing company, and of Harmony Productions, a public speaking and corporate training bureau based on his study of applied cognitive science. For Musical iPress, he created and produced over twenty instructional titles. For Harmony Productions, he organized and presented a variety of public speaking events.
Matthew McKay, PhD, is a professor at the Wright Institute in Berkeley, CA. He has authored and coauthored numerous books, including The Relaxation and Stress Reduction Workbook, Self-Esteem, Thoughts and Feelings, When Anger Hurts, and ACT on Life Not on Anger. He has also penned two novels: Us and Wawona Hotel. 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. He lives and works in the greater San Francisco Bay Area.