Amazing. I don't even know how to describe it. There's not much in the way of plot, it's more a journey through a period in Ari's life, a serious of episodes linked by the idea of trying to find out who you are and how you fit into the world. Almost stream of consciousness type writing, these long conversations of two and three word sentences where half the time they're just repeating what each other says. And it WORKED. It really, really did. If it was an adult novel it might fit in the literary genre, and it's the first time I've seen anything like that in YA. The more I think about it, I'm tempted to up that rating to 5 stars. 
 The characters are real, and flawed, and Ari is so sad and angry and lost. It ought to feel bleak but there's always this air of hope littered through it, and I thought the ending was absolute perfection. I'm not sure what else I can say about it. Just go read it!