La habitación secreta (Mortina, 6)

Mortina is a girl unlike any other: she is a zombie. Every house hides a mystery… Just ask Mortina, who has discovered a passageway in the library of Decaying Manor leading to a mysterious room. But to open the door, she must solve a riddle far, far away. Accompanied by her dog, Gloom, and her inseparable cousin Dilbert, Mortina sets off on a journey to find the key to the mysterious room. For behind that door lies the answer to the only question that truly matters: Why is hers a family of zombies?