The Demon Queen and the Locksmith

In Turquoise, New Mexico, a small group of hippies believe that the mountain north of town emits a constant, resonant hum that is only audible to a chosen few. They call themselves the Hearers, and the fact that fourteen-year-old Kevin Brown has never trusted them makes it all the worse when his own ears begin to ring, and he comes to realize "The Turquoise Hum" may be much more than a sound.