Publisher's Synopsis
George and Harold accidentally create a monster in the fifth book in this #1 New York Times bestselling series by Dav Pilkey, the author and illustrator of Dog Man!
When it becomes clear that she can't solve the mystery on her own, Olive teams up with some unlikely allies who help her learn the truth about the bird. And on the way, she just might learn that our fragile places lead us to the most wonderful magic of all . . .