Defeating princess

he had a good look of me and since i was disguising he couldn't tell it was a prince. He started taking the side of the princess and said that i wasn't even wearing proper clothes to be able to enter the treasure's pavillion. I told him that there was no notice regarding what kind of clothes i should be wearing while entering treasure's pavillion and furthermore i was looking towards the book not her. I just didn't want to talk to her that's why I didn't asked her for the book. The owner could not believe that I could buy such a precious book by looking at my clothes. He started to laugh at me and said that the book was of 1000 pieces of silver and said that I could have the book if i would be able to pay it. I took out a piece of gold and gave it to him. He kept looking at me dumbfounded. Then i said what now are you not going to give it to me. Then the princess said that she wanted the same book too and was willing to pay as much as required. I told the owner what about the rule that the first comer takes it first. Now he was confused whether to give it to me or not. Now the crowd started protesting and the shopkeeper had to give it to me. The princess's face was red.....