John Gill Commentary 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?" — 2 Kings 1:18 (ASV)

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) .