The Fae Chronicles: The Hollow Forest

Piper Gray, Ryan Delaney, and Rowan Whittaker are your average 16-year-olds. They go to school, they sleep, they spend unnecessary amounts of time on the internet, same as you.
Waterbury, South Dakota is your average small town.
Until people start disappearing.
They turn up, dead on the side of the roads in a few days, of course, but with their eyes milky white and the color drained from their skin. And what's more, Ryan, Piper's best friend since she was eight, starts acting strange.
One day, he disappears and when Rowan and Piper set out to look for him, what they find is beyond anything anyone could ever dream of imagining.