Twilight / True Blood

They're devouring our blood and our money. And still we crave more vampires. And more ... and more ... and more.

The obsession with the sultry, immortal beasts is currently a deliciously lucrative business, especially when you add up revenues from movies, books, TV shows and merchandising. Citing its own projections, The Hollywood Reporter estimates that vampires are pulling in a staggering $7 billion in total sales.

Is it true? How can it be?

"It doesn't surprise me. That number shouldn't shock us," box office tracker Paul Dergarabedian of tells PopEater. "There's no question that it's a multibillion-dollar industry. Vampires actually do have power over mortals and are causing people to spend more money."