Early one morning in New York City, Will Heller, a sixteen-yearold paranoid schizophrenic, gets on an uptown B train alone. Like most people he knows, Will believes the world is being destroyed by climate change; unlike most people, he’s convinced he can do something about it. Unknown to his doctors, unknown to the police—unknown even to Violet Heller, his devoted mother—Will alone holds the key to the planet’s salvation. To cool down the world, he has to cool down his own overheating body: to c...