New York Times bestselling author David Levithan takes young readers on a twisting journey through truth, reality, and fantasy and belief.

Aidan disappeared for six days. Six agonizing days of searches and police and questions and constant vigils. Then, just as suddenly as he vanished, Aidan reappears. Where has he been? The story he tells is simply. . . impossible. But it's the story Aidan is sticking to.

His brother, Lucas, wants to believe him. But Lucas is aware of what other people, including their parents, are saying: that Aidan is making it all up to disguise the fact that he ran away.

When the kids in school hear Aidan's story, they taunt him. But still Aidan cli