Which theme is not covered in the book of Isaiah?

The theme of the life of Jesus Christ is not covered in the book of Isaiah because Isaiah is primarily focused on the context of the times in which it was written, providing prophetic messages to the people of Israel and Judah. It addresses issues such as God's judgment, hope, and the consequences of disobedience, but it does not detail the life of Jesus Christ, as this would be a narrative that comes later in the New Testament.

In contrast, the other themes listed, such as God's judgment and hope for nations, oracles of consolation, and the fate of Jerusalem, are significant threads throughout the book of Isaiah. Isaiah speaks extensively about the consequences of turning away from God, the hope of redemption, and the ultimate return and restoration of Jerusalem, which aligns with God's overarching plan for His people.