The Thing About Jellyfish: 04/08/17
There's something about jellyfish that inspire stories about death and social awkwardness. In the case of The Thing About Jellyfish by Ali Benjamin it's the tale of a teenage girl refusing to believe her athletic friend could drown while swimming in the ocean. She has decided instead that her death was by jellyfish sting.
Suzy goes silent, refusing to talk to anyone, and secretly begins to plan a trip to Australia to meet with a jellyfish expert. But there are rules to flying internationally as a minor and it's obvious from the very beginning that this idiotic plan won't work.
As she doesn't talk, most of the book is internal narrative. Her feelings on things. Her refusal to play along. Her memories of her friend.
If jellyfish are your thing and you want another story of a girl trying to find her place in the world, I recommend the manga series, Princess Jellyfish (Kuragehime) by Akiko Higashimura.