Charles Ellicott Commentary 2 Kings 21:17

"Now the rest of the acts of Manasseh, and all that he did, and his sin that he sinned, are they not written in the book of the chronicles of the kings of Judah?" — 2 Kings 21:17 (ASV)

Now the rest of the acts of Manasseh ... — See 2 Chronicles 33:11–19 for the story of his captivity, repentance, and restoration, which is now acknowledged by the best critics to be genuine history, though at one time it was the fashion to consider it an edifying fiction of the chronicler’s.