More than any other book in the Old Testament, Isaiah reveals the depth of God's character, the depth of the Gospel and the depth of God's great plan for world history. Isaiah wants us to know that God is holier than we think (Isaiah 1-12), and to warn us that God is sterner than we think (Isaiah 13-35). And yet, he also wants to reassure us that God is stronger than we think (Isaiah 40-55), and to call us to...