Captain Underpants and the Sensational Saga of Sir Stinks-A-Lot (Captain Underpants #12) (12)

There's something rotten in the state of Ohio, and it's smellier than a pile of putrid gym socks! Steer clear -- it's Sir Stinks-A-Lot!

George and Harold, and their doubles, Yesterday George and Yesterday Harold, have a good thing going. Two of them go to school, while the other two hide in the tree house and play video games all day -- then they switch! But when their malicious gym teacher, Mr. Meaner, creates a method of mind-control that turns their fellow students into attentive, obedient, perfect children, the future of all humanity will be in their hands!

• Captain Underpants and the Tyrannical Retaliation of the Turbo Toilet 2000 (Captain Underpants #11)
• Captain Underpants and the Revolting Revenge of the Radioactive Robo-Boxers (Captain Underpants #10)
• Captain Underpants and the Terrifying Return of Tippy Tinkletrousers (Captain Underpants #9)
• Captain Underpants And The Preposterous Plight Of The Purple Potty People
• The All New Captain Underpants Extra-Crunchy Book o' Fun 2
• The Captain Underpants Extra-Crunchy Book o' Fun
• Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy, Part 2: The Revenge of the Ridiculous Robo-Boogers (Captain Underpants #7): Color Edition
• Captain Underpants and the Wrath of the Wicked Wedgie Woman: Color Edition (Captain Underpants #5)
• Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy, Part 1: The Night of the Nasty Nostril Nuggets (Captain Underpants #6)
• Super Diaper Baby 2: The Invasion of the Potty Snatchers