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 Attack of the Talking Toilets is an American children's book by Dav Pilkey, and the second book in the Captain Underpants book series. It was published at some point in February 1999. It marks the first appearance of the Turbo Toilet 2000, the Talking Toilets, and the Incredible …