One summer my parents sent me and Charlie to stay with our uncle Joe in Seattle. I had to share a room with Charlie, and his snoring kept me from sleeping. Uncle Joe gave me a white-noise machine. When it was time for bed, I fired it up and listened to the static. It was nice at first—like crumpling paper or a fly’s endlessly buzzing wings—but after a while, I began to hear things in the noise. Random words or bits of music repeating. I woke up Charlie and made him listen, convinced I’d discovered a secret message left by spies, but he punched me and went back to sleep. Once I heard the
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