John Gill's  Exposition of the Bible 

2 Kings 1:18

Now the rest of the acts of Ahaziah which he did, are they not written in the book of the chronicles of the kings of Israel?

Now the rest of the acts of Ahaziah which he did,.... During his two years' reign, which yet were imperfect, and his acts must be but few:

are they not written in the book of the chronicles of the kings of Israel? in which were written his father Ahab's also, and his predecessors', see 1 Kings 22:39.