Gone by Michael Grant
In a small town on the coast of California, everyone over the age of fourteen suddenly disappears, setting up a battle between the remaining town residents and the students from a local private school, as well as those who have "The Power" and are able to perform supernatural feats and those who do not.
Review from School Library Journal:
"One minute the teacher was talking about the Civil War. And the next minute he was gone." Just vanished-along with everyone else over the age of 13 in a 20-mile radius around Perdido Beach, CA. The children left behind find themselves battling hunger, fear, and one another in a novel strongly reminiscent of William Golding's Lord of the Flies. Things go from bad to worse when some of the children begin exhibiting strange powers, animals show signs of freakish mutations, and people disappear as soon as they turn 14. Though an excellent premise for a novel, Gone suffers from a couple of problems. First, it is just too long. After opening with a bang, the initial 200 or so pages limp along before the action begins to really pick up. Secondly, based on the themes of violence, death, and implied sexual intimidation, this is clearly written for an older teen audience who may not appreciate the fact that no one in the book is older than 13. In spite of its faults, Gone is a gripping and gritty read with enough creepy gruesomeness to satisfy readers who have a taste for the macabre.