Forget "Harry Potter" and "Twilight." In a few months, "The Hunger Games" phenomenon will be taking over the pop culture world. Although it will be feeding off the tween demographic, this franchise will chew up those other guys and spit them out. But what exactly is this "Hunger Games" wonder that has so many folks talking months before the movie (which just wrapped up filming earlier this month) is even released? Like many of the wildly successful film franchises these days, it began with a book.