Dav Pilkey

Captain Underpants and the Invasion of the Incredibly Naughty Cafeteria Ladies from Outer Space is the third book of the Captain Underpants series by Dav Pilkey. The series of American children's books are about two fourth graders, George and Harold, and their mean principal Mr. Krupp, who can turn into Captain …

Captain Underpants and the Perilous Plot of Professor Poopypants is the fourth book in the Captain Underpants series written by Dav Pilkey.

Tra-la-laaa! Captain Underpants is back in an all-new epic adventure that's the zaniest, funniest, outrageousest, and time-travelingiest yet!When we last saw our heroes, George and Harold, they were under arrest and headed for prison. Then Harold foolishly uttered the fateful words "What could be worse than going to …