Underworld Trilogy (2003, 2006, 2009)

Forget Team Jacob and Team Edward for a moment, this series was the first to start the ongoing battle between vampires and werewolves. But it is easy to forget that it’s about vampires since Kate Beckinsale (team vampire) looks distractingly…um, distracting, in her tight leather combat suit
. Underworld’s premise was also among the first to reach for a scientific explanation – viruses from a bat and a wolf turned the entire planet into the two warring species