The new concept is more related to the content of the book, the book talks about the different characters that we all have which creates our charisma where it helps us understand our own charisma. The book contains  stories and the way you imagine the story and answer the questions, will let you know more about yourself, that is why the doors representing the different answers that you can choose from, and the difference between the characters, is shown in the way that each door has a whole different appearance than the other.