Out-of-this-world magical adventure series for teens from the award-winning, New York Times bestselling author of Sabriel and the Old Kingdom series. Seven days. Seven keys. One very unlikely hero. Arthur must retrieve the Second Key from Grim Tuesday in order to save everything - an adventure that will force him to steal a sunship, survive a very weird work camp, befriend a bearlike spirit, and fight the void Nithlings. And even after all that, he will still have to venture into the scary Far Reaches for an ultimate showdown. The stakes arehigh. And time is ticking.