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Summary
After her town is invaded by guinea pigs who appear to have a green glow and are thought to be ghosts, Mariella records clues about them in her journal as she and her Mystery Girls try to discover what they really are. Full description
Series: Mariella Mystery investigates
A cupcake conundrum
The ghostly guinea pig
The huge hair scare
The mystery of the cursed poodle
The disappearance of Diana Dumpling
A kitty calamity
The spaghetti yeti
The mystic mustache