John Gill Commentary 1 Kings 15:31

"Now the rest of the acts of Nadab, and all that he did, are they not written in the book of the chronicles of the kings of Israel?" — 1 Kings 15:31 (ASV)

Now the rest of the acts of Nadab, and all that he did
In his short reign, which yet were more than here related:

are they not written in the book of the chronicles of the kings of
Israel ?
in which those of his father Jeroboam were written, (1 Kings 14:19) .