Pekah is Plotted Against and Killed by Hoshea

Then Hoshea son of Elah led a conspiracy against Pekah son of Remaliah. In the twentieth year of Jotham son of Uzziah, Hoshea attacked Pekah, killed him, and reigned in his place.

As for the rest of the acts of Pekah, along with all his accomplishments, they are indeed written in the Book of the Chronicles of the Kings of Israel.