People regard John Greens books as teen novels, when in actual fact they hold such deep and adult themes. Like tfios, it's all about life and how we should make the most o it while we can. Looking for Alaska: is all about decisions, and paths and how friendship can help us. John Green writes teenage novels yes, but makes them more appealing by not writing about pathetic teen themes.
This fits with a statement of my own which I often quote to people: "Everything in Life Follows a Sine Wave". When you are at the bottom of the trough, you will surely rise again to the Crest of the Wave. Good Mood - Bad Mood - Good Mood. Please think about it. Everything!