Here is the first book to explore every facet of the most common and debilitating emotional state: worry. While a healthy level of worry can help us perform efficiently at work, anticipate dangers, and learn from past errors, in its extreme forms worry can become "toxic" -- poisoning our pleasures, sabotaging our achievements, and preventing us from resolving actual problems. In this lucid, reassuring book, Dr. Hallowell discusses all types of worry, explores their underlying causes, and considers the best strategies for channeling excess worry healthily and ending toxic worry once and for all. Filled with practical solutions and insightful guidance, "Worry" will help chronic worriers lead happier and more rewarding lives.