Book excerpt: In the wake of October’s The Sandman Universe Presents: Hellblazer #1, John Constantine is loose in our world again- and unfortunately for Tim Hunter, he’s convinced the only way for the human race to survive is if Tim is taken off the board. But from where Tim’s standing, he’s the only one with the power to save us all. Who’s right? Who’s wrong? And is there room in London for the both of them? The scribes of Books of Magic and John Constantine, Hellblazer square off to tell both sides of the tale in a unique, innovative issue!