This biography paints a human and spiritual portrait of Leo XIV, the first American and Peruvian Pope, an Augustinian with a solid intellectual formation and a missionary heart. Through a well-documented and engaging narrative, Rafael Lazcano traces his life from his university years and formation in Rome to his ministry in Peru and his election as Pontiff. With rigor and intimacy, the author reveals the personality of a pastor who fostered an open Church, sensitive to young people and committed to human dignity, social justice, women, and peace. The work presents Leo XIV as a Pope of encounter, capable of integrating faith, reason, and technology without losing the depth of the Gospel. This book invites readers to discover the inner journey and serene leadership of a man who presents himself to the world in a way that is dialogical, reflective, approachable, flexible, sober, and solemn, with authority.