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And it is not long before Arthur realises that a chilling person named Mister Monday will stop at nothing to get the key back from Arthur... Arthur will need to enter the mysterious house that has appeared in town - a house that only he can see.
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.
He can't get into the impregnable Upper House, and even if he does, finding the Sixth Part of the Will and the Sixth Key might not be enough to stop Saturday's ultimate bid for power.
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