The genre of Joel is Narrative and Prophetic Oracle. The prophet Joel wrote it around 841-835 B.C. sometime before the fall and exiles of the Northern and Southern Kingdoms. Key personalities are Joel and the people of Judah. Its purpose was to call the Southern Kingdom to repentance or prepare for the coming judgment. Joel describes the locust that inflicts severe damage to everything in their paths, and warns that it is only the beginning of what is to come.