The Book of Zephaniah is one of the twelve minor prophets in the Old Testament of the Bible. It is attributed to the prophet Zephaniah, who lived during the reign of King Josiah of Judah in the 7th century BCE. The book primarily focuses on themes of judgment and restoration, warning the people of Judah about impending divine judgment due to their idolatry and wickedness. Zephaniah's prophecies emphasize the coming "day of the Lord," a time of reckoning for nations and individuals. However, it also offers hope, promising that a remnant of faithful people will be saved and that God will restore the fortunes of His people.