The stories are deceptively simple but extremely entertaining - the Pigeon wants to eat a hot dog, the Pigeon doesn't want to go to sleep, the Pigeon wants a puppy, etc.
Mo was a writer and animator for Sesame Street so there's a nice mix of humor for the kids and adults alike.
We haven't sampled any of his Elephant and Piggie books yet but both boys have birthdays coming up, so Shari if you're reading this - hint, hint.