Max Sumner and his fellow Grey Griffins, Ernie, Harley, and Natalia, set off on another extraordinary adventure, traveling to Scotland to visit Max's dad for the winter holidays. It doesn't take long before strange things start to happen to the four kids while they explore Mr. Sumner's ancient castle.
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Max Sumner and his fellow Grey Griffins, Ernie, Harley, and Natalia, set off on another extraordinary adventure, traveling to Scotland to visit Max's dad for the winter holidays. It doesn't take long before strange things start to happen to the four kids while they explore Mr. Sumner's ancient castle.
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