Judy can't wait for her mischief to bear fruit when Stink discovers that his backyard science project is an overnight success. Hardy-har-har! Prankenstein strikes again! The Summer Science Showdown is just around the corner, and Stink is positive that he has the recipe for a winning entry. Soon he's acting like a mad scientist, with strong-smelling potions in hand and visions of super tomatoes dancing in his head. Judy takes one look at her busy brainiac brother and sees a situation ripe for a little mischief! Everyone knows that Judy has never met a practical joke she doesn't like, and soon the Princess of Pranks is cooking up a recipe of her own. From Megan McDonald comes an epic match of wits in a Judy Moody story perfect for newly independent readers.