Arthur Penhaligon is not supposed to be a hero. He is supposed to die. But then he meets the sinister Mr. Monday and everything changes. Seven days. Seven keys. One mysterious book. One strange house filled with secrets.

Arthur Penhaligon's magical adventures continue as he faces a new grave danger -- in the form of an enemy named Grim Tuesday. More amazing fantasy from best-selling author Garth Nix. Arthur doesn't think he will ever have to return to the strange house that nearly killed him on Monday -- the house that contains an entire world.

But Tuesday brings new challenges -- in the form of an enemy named Grim Tuesday, who threatens the well-being of both Arthur's family and his world. Arthur must retrieve the Second Key from Grim Tuesday in order to save everything -- an adventure that will include stealing a Sunship, surviving a very weird work camp, befriending a bearlike spirit, fighting the voidlike Nithlings, and traveling to the scary Far Reaches for the ultimate showdown.

Everyone is after Arthur Penhaligon. Strange pirates. Shadowy creatures. And Drowned Wednesday, whose gluttony threatens both her world and Arthur's. With his unlimited imagination and thrilling storytelling,

Four of the seven Trustees have been defeated and their Keys taken, but for Arthur, the week is still getting worse. Suzy Blue and Fred Gold Numbers have been captured by the Piper, and his New Nithling army still controls most of the Great Maze. Superior Saturday is causing trouble wherever she can, including turning off all the elevators in the House and blocking the Front Door. Amidst all this trouble, Arthur must weigh an offer from Lady Friday that is either a cunning trap for the Rightful Heir or a golden opportunity he must seize--before he's beaten to it!