This is actually the 4th book of Kings, continuing from 1 Kings which contains the 3rd book. Together they are called Melakhim in the Hebrew Bible. (The 1st and 2nd books are called 1 Samuel and 2 Samuel in Protestant bibles (like the King James).) Includes Jeroboam's reign and the worship of idols, and a lot of confusing war and politics. Attributed to the Prophet Jeremias, likely written about the same time as the fall of Jerusalem (587 B.C.). Someone else may have written the final verses.
Contains a lot of nastiness, see 2 Kings 2
:23,24 and 2 Kings 15
:16 for examples of carnage