Christopher is having a birthday. "It's my birthday, too", says his younger brother, Robbie. "It is Not your birthday", says Christopher. "It is mine, and I am going to have a party". "I get to come, too", says Robbie. But Christopher is sure Robbie will wreck his party -- he's not big enough to play the games or sing the songs, and he even thinks that he will get presents. Sharing a special day does not look like it's going to be easy!Within the framework of that unmistakable power struggle between brothers, Robbie comes up with a creative way to get exactly what he wants, and Christopher has a birthday he won't soon forget. Once again, Jonell and Mathers create a "hilarious, ingenious picture book" (The Horn Book, starred review for Mommy, Go Away), that captures so well a child's eye view of the world.