This book offers a comprehensive and accessible biography of Saint Francis of Assisi, from his medieval Umbria to the global impact of his charism today. It combines historical rigor with an approachable tone to narrate his restless youth, his radical conversion, the birth of the fraternity, internal tensions, and the expansion of the Franciscan family. It explores symbols like the TAU, the nativity of Greccio, and 'peace and good'; analyzes his imprint on art, music, literature, and public life; and shows how his vision of minority, poverty, joy, and care for creation inspires contemporary responses in education, solidarity economics, and interreligious dialogue. A work conceived for readers seeking spiritual depth without renouncing the beauty of a good story.