School principals
123 books
The Adventures of Captain Underpants
Captain Underpants and the Attack of the Talking Toilets
Captain Underpants and the Wrath of the Wicked Wedgie Woman
Captain Underpants and the Invasion of the Incredibly Naughty Cafeteria Ladies from Outer Space
Watching you
Captain Underpants and the Perilous Plot of Professor Poopypants
Captain Underpants and the Preposterous Plight of the Purple Potty People
Captain Underpants and the terrifying return of Tippy Tinkletrousers
The terrible two
Olivia
Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy, part 2
Captain Underpants and the revolting revenge of the radioactive robo-boxers
Village school
Fifth Business
Captain Underpants and the Tyrannical Retaliation of the Turbo Toilet 2000
Captain Underpants and the Sensational Saga of Sir Stinks-A-Lot
Captain Underpants and the big, bad battle of the Bionic Booger Boy, part 1
Simply Perfect
Mr. Lincoln's way
Dr. Carbles Is Losing His Marbles!
The Scandalous Schoolmistress
Mr. Tanen's ties
The Principal From the Black Lagoon
Mr. Klutz is nuts!
To serve them all my days
Three More Wedgie-powered Adventures in one
Lady Be Good
A fine, fine school
Help! I'm trapped in my principal's body
