As You Wish by Chelsea Sedoti
Madison is a small town in the Mojave desert on the road between nothing and nowhere. The town has a secret: in Madison, everyone can make one wish on their eighteenth birthday– and that wish always comes true. Eldon has seen how wishing has hurt the people around him. His parents’ marriage is strained, his sister is a virtual ghost in their house, his ex-girlfriend is dating his ex-friend…. Now he has only twenty-five days to figure out what to wish for– and the rest of his life to live with the consequences.