Just when they thought they were out, it pulls them back in! Our heroes beat the Bionic Booger Boy, but they forgot about those rascally Robo-Boogers. Join George, Harold, Mr. Krupp, Melvin Sneedly, and Sulu the Bionic Hamster on an adventure that will take them into the deepest regions of... read more
Preceded by Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy, Part 1: The Night of the Nasty Nostril Nuggets, and followed by Captain Underpants and the Preposterous Plight of the Purple Potty People.
We’re hiding the errata, movie connections, books that influenced this book, books influenced by this book, books that cite this book and books cited by this book sections. If you would like to add content to them, you must first make them visible.