"Mastery: The Keys to Long-Term Success and Fulfillment" is a self-help and psychology book by George Leonard, published by Penguin Publishing Group in 1991. The book, in hardcover format, delves into topics of personal growth and success, offering insights and strategies for achieving mastery in various aspects of life. With 112 pages, the book emphasizes the importance of continuous learning and practice to attain long-term fulfillment and success. Written in English, this book is a valuable resource for those seeking to improve themselves and reach their full potential.