Heist Society - Population: Theme

In my book Heist Society by Ally Carter, I see a theme and this theme could cure a lot of people and those people are sick because they steal.The theme is If you steal you are great artist but if you copy you are a good artist and I think this means that if you are good at what you do and you are good to others you copy them not take their stuff and say it is yours.I think it also says that if you are a great person at what you do but not great to others then you steal from others and you say it is yours.In the book there is a girl named Kat who is a thief and her friends and family try to solve a mystery that her father is in.The father is in a mishap with another theif and that theif thinks that he took his paintings so he is great but he steals others lives and Kat tries to prove he is not guilty of stealing his paintings and in the end she finds out who really stole them and they get taken away and it ends with Kat going back to school and living a happy life in New York City.