nooo I used to know the answer
She was 16. She originally started to write this book because on of her friends had gotten beat up so she just wanted to rant, another fun fact: since she was so young and also a girl, she didnt want people to not buy her book becuaseof that so she decided to stay anomus just like j.k rowling
You forgot to add a story to the question... I would gladly help you tho ;)
When you are doing exactly at the moment not what you did yesterday,or what you are going to do tomorrow but at the very moment.
The main idea behind it is that life is short and that we need to laugh and be happy while we have time and not focus on negative things because life is short. If life hits you in the teeth there's no reason to be depressed forever about it, just laugh and be happy and keep moving on.