Sky Took Us

A strange black orb appears. First Toronto. Then New York. Then Beijing. And then people start disappearing.Sixteen-year-old Kris watches her mother vanish as the first orb hovers over a downtown square. More follow. Entire cities empty.The world is running out of time.Kris is an exceptional young mind, so she sees what others miss: the flashing patterns in the orbs aren't random. They're mathemat...