I'm a big fan of the Orson Scott Card book Ender's Game. I read the entire series for the first time this past July during our summer vacation. I would have to agree with this comic, Ender's Game was the best. However, I thought the whole series was worth it. To say that one is the best does not imply the others are not good - they were all excellent.
This cartoon from XKCD was just too timely to not share.