The train rattles as it moves beneath the city. Shadows rush past the windows, little more than streaks of movement, dark on dark. I can feel the ebb and flow of the Veil, the drumbeat of ghosts on every side. “Well, that’s a pleasant thought,” says my best friend, Jacob, shoving his hands into his pockets. “Scaredy-cat,” I whisper back, as if I’m not also creeped out by the presence of so many spirits.