This book was a disappointment. I picked it up thinking it was going to be about a twenty-three year long journey through space, and instead it was mostly a reflection on how people in their late teens/early twenties deal with loneliness. It wasn't bad, per se, just not at all what I expected. Also, and I'm not sure this was intentional, but almost every mention of sex or physical intimacy was treated as something the characters should be ashamed of or were disgusted by. This book just wasn't for me.