The book of Joel is a prophetic book of the Old Testament, written by the prophet Joel. It is believed to have been written around the 8th century BC, during the time of the divided kingdom of Israel. The book is composed of three chapters, and is a call to repentance and a warning of impending judgment.
The book begins with a call to repentance, as Joel warns of a coming judgment from God. He describes a great locust plague that has devastated the land, and calls on the people to return to the Lord and seek His mercy. He warns that if they do not repent, the Lord will bring a great army to punish them.
In the second chapter, Joel calls on the people to fast and mourn, and to turn to the Lord in repentance. He promises that if they do, the Lord will restore them and bring them back to the land. He also warns of a coming day of the Lord, when God will judge the nations and bring destruction upon them.
The third chapter is a vision of the future, when the Lord will restore the land and bring peace and prosperity. Joel prophesies that the Lord will pour out His Spirit on all people, and that He will judge the nations and bring justice to the oppressed. He also promises that the Lord will restore the land and bring back the exiles.
The book of Joel is a powerful call to repentance and a warning of impending judgment. It is a reminder that God is a God of justice and mercy, and that He will bring judgment upon those who do not turn to Him. It is also a reminder that God will restore and bless those who turn to Him in repentance.