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Grace never imagined that cryptic letters— and her clever cat, Whiskers— would pull her into Maple Hollow’s darkest secrets. Beneath the town’s peaceful exterior, an ancient experiment threatens to tear reality apart. With Parker, a wounded but determined ally, and the mysterious Margaret, long thought dead, Grace must race against time. A dangerous force is buried deep, and ruthless enemies will stop at nothing to silence her. In a final, pulse-pounding showdown, Grace must crack the letters’ hidden clues to prevent catastrophe. But even when the experiment is shut down, something far more sinister still stirs beneath Maple Hollow.