Have you heard the buzz about this new joke book? The Shock Book Prank delivers a powerful but harmless shock when it's opened up. Great gag to fool your friends. Leave the shocking joke book on your coffee table and wait for the telltale screech, then laughter. The fun labels on the front read "World's Greatest Jokes" and "Ha Ha" and will surely entice your unsuspecting victim to pick it up and take a look.