This is my second John Green book, and I think I kind of love him as an author. :) 
 Colin is great, and not a little bit unlike me, with the whole prodigy-but-maybe-not-genius-strictly-speaking thing going on. :) I also liked that Colin wasn't a *complete* nerd. We prodigies can be interesting, too. 
 The footnotes and appendix were another level of awesomeness. 
 This is definitely a book to put on my "to buy" list.