Simplify the following text for a Grade 6 native English-speaking person.
Original: The division between 1 and 2 Kings has been made shortly after the deaths of Ahab of the northern kingdom and Jehoshaphat of the southern kingdom . Placing the division at this point causes the account of the reign of Ahaziah of Israel to overlap the end of 1 Kings ( 22:51 â `` 53 ) and the beginning of 2 Kings ( chapter 1 ) .
Simplified: 1 and 2 Kings , like 1 and 2 Samuel and 1 and 2 Books of Chronicles ) are actually one book .