William J. Knaus, EdD, is a licensed psychologist with more than forty-six years of clinical experience working with people suffering from anxiety, depression, and procrastination. He has appeared on numerous regional and national television shows, including The Today Show, and more than one hundred radio shows. His ideas have appeared in national magazines such as U.S. News & 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 postdoctoral psychotherapy training in rational emotive behavior therapy (REBT). Knaus is author or coauthor of more than twenty-five books, including The Cognitive Behavioral Workbook for Anxiety, The Cognitive Behavioral Workbook for Depression, and The Procrastination Workbook.