Jeff Allen vs. the Time Suck Vampire
From the Series Devils' Pass
Jeff Allen needs a new phone. But for a new phone, Jeff needs money and therefore a job. When he starts working at the new cell phone shop for Mr. Vlad, he thinks he's got it made. Soon, he notices things aren't quite right. The new phones come preloaded with a game, and everyone in town--including his friends--seem obsessed. But not normal-obsessed; they're Devil's Pass obsessed, which, in his town, often leads to very bad things. Jeff has to find what's causing the obsession and break the spell before the town and his friends succomb to the mortal danger in front of them.