He has appeared on numerous regional and national television shows including the Today Show, and more than 100 radio shows. His ideas have appeared in national magazines such as U.S. News and World Report and Good Housekeeping, and major newspapers such as the Washington Post and the Chicago Tribune. He is one of the original directors of training in rational emotive behavior therapy. Knaus is author of twenty books, including The Cognitive Behavioral Workbook for Anxiety and The Procrastination Workbook. Foreword writer Albert Ellis, PhD, was a pioneering theorist of cognitive behavioral therapy and the founder of rational emotive behavior therapy. He is author of many books, including A Guide to Rational Living and Reason and Emotion in Psychotherapy.