Bill Myers 
Elijah Project [EPUB ebook] 

After finding a bizarre note from their parents, siblings Zach, Piper, and Elijah take a wild cross-country trip to find them. Unfortunately, Elijah’s supernatural gifts draw attention from the wrong people, and he is captured by the Shadow Man. It is up to Zach and Piper to save Elijah, but when they themselves are captured, will they be able to break free from the mesmerizing machine that promises them greatness? Or will they forever pay the cost of following darkness?