12 books — in reading order
The Adventures of Captain Underpants
Dav Pilkey
Captain Underpants and the Attack of the Talking Toilets
Captain Underpants and the Invasion of the Incredibly Naughty Cafeteria Ladies from Outer Space
Captain Underpants and the Perilous Plot of Professor Poopypants
Captain Underpants and the Wrath of the Wicked Wedgie Woman
Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy, Part 1
Captain Underpants and the Big Bad Battle of the Bionic Booger Boy, Part 2
Captain Underpants and the Preposterous Plight of the Purple Potty People
Captain Underpants and the Terrifying Return of Tippy Tinkletrousers
Captain Underpants and the Revolting Revenge of the Radioactive Robo-Boxers
Captain Underpants and the Tyrannical Retaliation of the Turbo Toilet 2000
Captain Underpants and the Sensational Saga of Sir Stinks-A-Lot
