The commander of Pekahiah’s army was Pekah son of Remaliah. Pekah killed Pekahiah in Samaria at the king’s palace. Pekah had 50 men from Gilead with him when he killed Pekahiah. Then Pekah became the new king after him.
All the great things that Hezekiah did, including his work on the pool and the aqueduct to bring water into the city, are written in the book, The History of the Kings of Judah.