Download or read book Phineas and Ferb: Agent P's Top-Secret Joke Book written by Jim Bernstein and published by Disney Electronic Content. This book was released on 2011-06-07 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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!