What is there to say that hasn't been already said? This is about Astrid, a girl living in Unity Valley who sends her loves to airplanes up in the sky. Why does she send it? From what I got, the pressures of people in Unity Valley, her mom, her dad, her sister - her society. 
 It's a book on questioning - of finally being able to answer that question and being true to not only oneself but being able to finally say it without shame. Although society can be crappy about things, once it's out in the open - that's when you're set free. 
 Gah, I don't even know what I'm trying to say aside from the fact that this book made me think about society a lot. How condemning it can be. How harsh the world can be. How much support and love we need to continue on our journeys as we continue to grow older.