As the book was redacted by Judean writers, it is not unnatural that the summary notices of the kings of Judah are more elaborate than those of Israel.
"Introduction to the Old Testament"
John Edgar McFadyen
Sometimes the sources have been demonstrably followed word for word, phrases like to this day being used of situations which had passed away by the time the book was redacted.
"Introduction to the Old Testament"
John Edgar McFadyen
We know indeed the names of a number of persons who redacted the History of Persia, originally in Pahlavi, for Arab readers.
"Iranian Influence on Moslem Literature, Part I"
M. Inostranzev