When Burns published "Feeling Good: The New Mood Therapy", it made Beck's approach to distorted thinking widely known and popularized. Burns sold over four million copies of the book in the United States alone. It was a book commonly "prescribed" for patients who have cognitive distortions that have led to depression. Beck approved of the book, saying that it would help others alter their depressed moods by simplifying the extensive study and research that had taken place since shortly after Beck had started as a student and practitioner of psychoanalytic psychiatry. Nine years later "The Feeling Good Handbook" was published, which was also built on Beck's work and includes a list of ten specific cognitive distortions that will be discussed throughout this article.