Poof!

Sam Temple is sitting in his U.S. History class, bored out of his mind. And then POOF!
His teacher vanishes. As Sam and his classmates come to realize, everyone over the age of 15 has disappeared. Cars crash because their drivers aren't there anymore. Over the next few weeks, Sam and his small circle of friends try to keep the little children safe, the power running, the town fed and the bullies at bay. But new kids in town with startling powers threaten the peace. Animals are mutating and down in the depths of a mine, an unspeakable darkness threatens every human in town. Can Sam save the town before his 15th birthday. Because Sam knows that on his birthday, he, too, will disappear.