That meanie Lewis always teases Gilbert. So why would Lewis invite Gilbert to his birthday party? Gilbert goes to the party armed with a cheerful grin, a brightly wrapped package–and a plan to get even for Lewis's rotten behavior. But this birthday has a much bigger surprise in store for Gilbert... Join the New York Times best–selling character Gilbert the opposum and his friends and family in this heartwarming picture book about birthdays, bullies, and doing the right thing. Ages: 4–8 That meanie Lewis always teases Gilbert. So why would Lewis invite Gilbert to his birthday party? Gilbert goes to the party armed with a cheerful grin, a brightly wrapped package–and a plan to get even for Lewis's rotten behavior. But this birthday has a much bigger surprise in store for Gilbert... Join the New York Times best–selling character Gilbert the opposum and his friends and family in this heartwarming picture book about birthdays, bullies, and doing the right thing. Ages: 4–8 Diane deGroat is the illustrator of more than 120 children's books and the author-illustrator of bestselling books about Gilbert, including Ants in Your Pants, Worms in Your Plants! (Gilbert Goes Green) ; April Fool! Watch Out at School! ; Mother, You're the Best! (But Sister, You're a Pest!) ; Last One in Is a Rotten Egg! ; and the New York Times bestseller Roses Are Pink, Your Feet Really Stink . Diane lives in Amherst, Massachusetts.