What is the main idea in the nonfiction book, Four Blood Moons: Something is About to Change?

Four Blood Moons: Something Is About to Change is a work of Biblical Studies and religious prophecy by John Hagee, utilizing the study of astronomy and the Bible in coordination with one another. In “Four Blood Moons”, Hagee argues that God is sending Jews, Christians, and the world messages through signs in the heavens. He presents a host of Biblical evidence demonstrating not only God’s support for the nation of Israel, but also evidence which demonstrates God has sent messages to mankind through astronomical events.