How, I ask you. How?

So my dad called yesterday and said, "I think you should write a book about vampires." Apparently he's just caught wind of the whole TWILIGHT phenom and (because he loves me) he wants me to get a piece of the action. Meanwhile tonight at the movie theater (my men and I went to see the new Bond movie), I was TRULY surprised at how many women there were in the bathroom. I've never seen so many women in a bathroom at a movie theater before--not even in New York City. And I asked myself, "Why are there so many women in this bathroom with me?" Then I realized they were all there to see the new TWILIGHT movie. And really, it was almost kind of frightening.

Which brings me to tonight's completely unoriginal question: how does a book become a phenomenon?