I've wondered for some time, how does one go about writing a story that shows what it's like to struggle with mental illness? How do you convey to a reader how it feels to constantly be drowning in your thoughts, spiraling in obsessive patterns, knowing how illogical and irrational your mind is behaving but rarely able to find a moment of breathe in it all? How do you express what it's like to be told by others how inadequate you are for not being able to just 'turn it off,' how ashamed you can feel and detached you feel from your own self even though it is part of yourself, how profoundly it impacts your life and relationships, telling yourself you are in control and feeling nothing but? How do you convey that to people? I sure haven't been able to figure it out. And yet, to my surprise, John Green finds a way. 
 John takes his struggle with OCD (where he battles more with the spiraling of obsessive thoughts than actions) and makes it as understandable as you can. There is one scene in particular that really drew the picture between a friend who writes it off, makes accusations that reflect a lack of understanding and Aza helps her to understand. It's a scene I could relate to in conversations I've had but I lacked that ability to express it. 
 It's a really sweet story, less about the mystery of the fugitive billionaire father and more about the relationships, the support we find in those willing to take a chance on our crazy, how lucky Aza is to have someone like that. The only reason I didn't give it five stars is because it's exhausting living in my own obsessive thoughts, reading them in another character becomes tiresome as well. And yet, there wasn't any other way to reflect that reality. As always, a beautiful return to storytelling by John Green.