What is the appeal that surpasses the "young adults" and includes moms, dads, not quite young adults yet, grandparents, SAHMs and professionals?
Admittedly some of the success can be attributed to smart marketing.
But, there has to be something more to a book that makes me want to read the series again, stand in line for hours to see the movie, eager for the next release and own a Team Edward t-shirt.
What do you think it is? What is the appeal?