Why is it Ironic when Hazel gets mad about Peter Van houten saying that characters cease to exist when the book ends? Why is it important?

This act gave the federal government the power to relocate any native in the east to territory west of the mississippi river.

The  pharaoh  was at the top of that pyramid. in the level below were nobles, priests, and officials. they the  pharaoh  govern egypt. so did soldiers, who fought battles for their ruler, and scribes,  who kept records  for the government and the temples. i know this