Two wise men, one message. They are two of the most significant leaders of our time: His Holiness the Dalai Lama and Archbishop Desmond Tutu. Although their lives have been marked by many adversities and dangers, they radiate a joy that is unshakeable. In the Book of Joy, the "brothers in spirit" combine their immense life experience and the wisdom of their world religions into a shared central insight: Only deeply felt joy can noticeably transform both individual lives and global events for the better. Regardless of all the challenges and crises we face daily, we can unleash and share this energy within us. Thus, joy becomes the driving force that adds more love and meaning to our existence - while also bringing hope and peace to our uncertain world.