The other events of the rule of Hezekiah are written down. That includes how he made the pool and the tunnel. He used them to bring water into Jerusalem. Everything he accomplished is written in the official records of the kings of Judah.
The other events of the rule of Manasseh are written down. That includes the sin he committed. Everything he did is written in the official records of the kings of Judah.
Then the people of the land killed all those officials who had made plans against King Amon. Then the people of the land made his son Josiah king in his place.