Gigantic insects! Massive monsters! And a fifty-foot feral Perry the Platypus! It's a creature double-feature as Phineas and Ferb invent their way through a maze of enormous insects and colossal challenges to make it home safe. And in an alternate reality adventure, Dr. Doofenshmirtz stars as a late-night horror movie TV host who teams up with Phineas and the gang when the real world becomes infested with nightmarish creatures. It's gigantic laughs and monstrous fun in this all-new, all-original graphic novel!