2 Kings 15:36

Now the rest of the acts of Jotham, and all that he did, are they not written in the book of the chronicles of the kings of Judah?

The closing formula concerning Jotham's remaining deeds belongs to the account of his reign as king of Judah. It stands within the larger history recorded in 2 Kings 7 to 23, which spans nearly three hundred years from Joram of Israel to the fall of Israel to Assyria and from Ahaziah of Judah through Jehoahaz. That long period traces both kingdoms through successive reigns to the captivity of the northern kingdom.

It was the time of the prophets Hosea, Jonah, and Amos, and in Judah of Joel, Isaiah, Micah, Jeremiah, Zephaniah, and Nahum. Throughout that history Judah always prospered under righteous and faithful rulers. Yet after such prosperity it turned from God to gross idolatry and thereby brought calamity upon itself and its people.