Rich Man, Poor Man

I read Rich Man, Poor Man. The main characters are Adam and Martha.
Adam lives in the village and Martha is wife. Adam's son sent a letter for father with money order. Adam's money order was for a hundred pounds. Suddenly he was a rich man. The post office official will give you the money. Adam went to the post office but the official did not give him the money. He felt old and he felt poor again.I thought it is very difficult to get money. I want to be a rich. This story was interesting.