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After sisters Parker and Ellie McFadden's mysterious aunt Sadie shows up, they join an underground society called the Sentry, where they are given a chance to hone their newly realized abilities, but they soon learn of a smoky, tentacled being, and the twins must rely on their new friends and teachers to help them defeat the fearsome threat and uncover the truth behind Sadie's mysterious assignment.

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Dansville Public Library J FIC BEN (Text)
Children's Fiction

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