New Stephen King novel later this month should be fun

Cell

What happens on the afternoon of October 1 came to be known as the Pulse, a signal sent though every operating cell phone that turns its user into something...well, something less than human. Savage, murderous, unthinking-and on a wanton rampage. Terrorist act? Cyber prank gone haywire? It really doesn't matter, not to the people who avoided the technological attack. What matters to them is surviving the aftermath.

(from Publisher marketing, but I love the story premise)