Slawter. Darren Shan

let them get away with it?” I cry. “You let them kill?”

      Dervish lowers the mug. “It’s not as heartless as it sounds. There’s far less magic in our universe than theirs. When they cross, they’re nowhere near as powerful as they are in their own realm. And most can only stay here for a few minutes. Occasionally a window will remain open longer, for an hour or two, but that’s rare. Thankfully. Because if they could cross with all their powers intact, and stay as long as they liked, we’d have been wiped out long ago.

      “We stop maybe half of all potential crossings,” Dervish goes on. “Which is pretty good when you consider how few of us there are. Although we’re only talking six or seven attempts to cross in any given year.”