Juvenile Fiction. Juvenile Literature. When Phineas and Ferb's older sister, Candace, discovers that a traffic camera has recorded her brothers' crazy adventures, she is thrilled that she finally can prove that they are always up to something! But little does she know that Perry the Platypus is after the same camera because it has caught him disguised as Agent P! Who will get to the camera first? Plus, the wild times continue when Phineas and Ferb build a giant bowling alley!.