The Book of Amos is one of the books of the Nevi'im (Hebrew: "prophets") and of the Old Testament. Amos is one of the minor prophets. Amos was the first biblical prophet whose words were recorded in a book, an older contemporary of Hosea and Isaiah. He was active c 750 BC during the reign of Jeroboam II. He lived in the kingdom of Judah but preached in the northern kingdom of Israel. His major themes of social justice, God's omnipotence, and divine judgment became staples of prophecy.