In the first seventeen chapters, we read about how the kings of the Northern and Southern Kingdoms led their people into more idolatry, which will eventually lead them into exile. These kings disobeyed God in various ways and it was during the reign of Hoshea, that the Assyrians come and take the Northern Kingdom into captivity.
We also read about how Elijah’s ministry as a prophet of God comes to an end, but Elisha whom he’s been in training for a while takes his place. Elisha does twice as many miracles, as Elijah, as God does His will through Him.
In the final eight chapters, we read that the Southern Kingdom of Judah were almost as bad as the Northern Kingdom of Israel, and they too were going to be judged by God.