Two siblings, Elfrida and Edred Arden, have recently become poor. However, the siblings inherit a ruined castle previously owned by a baron, and together they explore the depths of its mystery, hoping to find a treasure that will restore the castle and turn their luck around. Going back in time, they discover magical things they have never dreamed of. The siblings are swept off to see the plans of Napoleon and the inside of the Tower of London, and they even encounter a mouldiwarp (a magical mole). Most surprising of all: they find their lost father in South America, but is there still time to save him? A beautiful tale about family, sacrifice, and self-discovery. Excellent for fans of C.S. Lewis, Lemony Snicket and Madeleine L'Engle

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