Big, Bad Battle Of The Bionic Booger Boy Part 2: The Revenge of the Ridiculouys Robo-Boogers (Captain Underpants #7)The Preposterous Plight of the Purple Potty People (Captain Underpants #8)The Terrifying Return of Tippy Tinkletrousers (Captain Underpants #9)Captain Underpants and Revolting Revenge of the Radioactive Robo-Boxers (Captain Underpants #10)Captain Underpants and the Tyrannical Retaliation of the Turbo Toilet 2000 (Captain Underpants #11)Captain Underpants #12: Sensational Saga of Sir Stinks-A-Lot (Captain Underpants #12)
Time Travel Tribulations! George and Harold have been turned into evil zombie nerds doomed to roan a devastated, postapocalyptic planet for all eternity! Unfortunately, the boys can't count on Captain
