Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy, Part 2: The Revenge of the Ridiculous Robo-Boogers: Color Edition (Captain Underp

Bionic boogers return in the seventh book in this #1 New York Times bestselling series by Dav Pilkey, the author and illustrator of Dog Man! George and Harold thought they were beyond boogers. Their new pet, Sulu the Bionic Hamster, had defe...