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

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Number of Pages: 224

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 treehouse 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!