Dr. Doofenshmirtz is trying to destroy all of the laughter in the Tri-State Area with his latest evil invention--the De-Laugh-inator. It's up to Agent P to stop him, and the only way to defeat the evil doctor's plan is to read these hilarious jokes and riddles aloud! This second Phineas and Ferb joke book is filled with screen grabs and black-and-white original art throughout.