"Spine-chilling and creepy!" --Max Brallier, #1 New York Times bestselling author of The Last Kids on Earth, on Escape From Grimstone Manor (Monsterious, Book 1)

Twins Simon and Jade are thrilled to visit their grandfather in tiny Skull Rock, Maine, and stay with him above the cabinet of curiosities museum he runs, which is full of creepy old relics, taxidermy specimens, and other sinister odds and ends. But lately, strange reports have come out about a series of nighttime animal attacks in the area, leaving Simon wondering if Panther Man--a monster that's part human, part panther, and rumored to live in a cave outside of town--might be responsible. Could it be that the stories of Panther Man are true? Or is something far more dangerous prowling the streets of Skull Rock?