Athanasius of Alexandria (c.297–373) may be casually recognised as the champion of orthodox trinitarianism over the course of a long battle with Arius and his followers, primarily concerning the divinity of Jesus Christ. But who was this fascinating and combative man? What was his character? How did he conduct himself? What were his contributions to the debates and discussions of his day, and what has been his legacy? Gavin Kinnaird introduces, describes, and assesses this man of God, and helps us more accurately to understand and appreciate him.