The Lunch Club. Volume 7, Night of the living rocks

Tia, Leo and Mr. Peabody face off against Madame Celeste and her minions in her secret underground lair, where she's been plotting--naturally--to take over the world. The Lunch Club heroes have a perfect plan: wait until midnight, then sneak in and rescue Mr. Fish, the guardian of the Pisces constellation. What they don't account for? Madame Celeste has a legion of living rock minions, who capture Mr. Peabody. The list of who Tia and Leo need to...