I don't know. I was never really invested in the story and felt like DNFing many times. It was really quick though so I just kept going. A lot about this book bothered me (complaining about the "friend zone," his moderately stalkerish behavior, some stupidity about if the girl actually liked him or not, etc). I did like the ending though; a lot of people out there seem to be kind of disappointed by the conclusion, but I thought that it was appropriate. Most of the book was just background information followed by one hypothesis and then a couple of pages of investigation. I wish there was more information about why the girls actually didn't like him. I thought that it was kind of stupid that the whole book was based around that when actually very little of it was discussed.