The Mastery of Worry and Nervousness is a self-help book written by William S. Sadler. The book is designed to help readers overcome anxiety, stress, and nervousness. It provides practical advice and techniques on how to manage worry and anxiety, as well as how to develop a positive mindset and improve mental health. The book covers topics such as the causes of worry and nervousness, how to recognize and manage symptoms, and how to use relaxation...