Isaiah is the Chronicler of the Times of Uzziah and Hezekiah
Source: Nav
2 Chronicles 26:22
As for the rest of the acts of Uzziah, from beginning to end, they are recorded by the prophet Isaiah son of Amoz.
2 Chronicles 32:32
As for the rest of the acts of Hezekiah and his deeds of loving devotion, they are indeed written in the vision of the prophet Isaiah son of Amoz in the Book of the Kings of Judah and Israel.