HELEN I woke up suddenly. There was no sound in the room that should have caused it. I listened for a moment for any sound from outside, but I heard nothing. No knock at the door, no movement outside, and no obvious disturbance around me. One moment I had been asleep, and the next, I was staring into the darkness with my heart beating harder than it should have. For several seconds, I remained completely still. Something felt wrong. I couldn't immediately explain what it was, but I could feel the difference in the air around me. It was subtle, almost too subtle to notice if I wasn't paying attention, but I had spent too many years around certain things to ignore a feeling like that. I slowly pushed myself upright. My breathing was steady, but there was an uncomfortable sensation mov

