Captain Underpants and the Preposterous Plight of the Purple Potty People - Wikipedia

Is there a reason behind the release gaps between book 8 and 9? : r/ CaptainUnderpants

The Adventures of Captain Underpants, Captain Underpants Wiki

Melvin Sneedly, Captain Underpants Wiki

Captain Underpants & the Preposterous Plight of the Purple Potty People: Dav Pilkey: 9780756972332: : Books

Captain Underpants and the Preposterous Plight of the Purple Potty People, Captain Underpants Wiki

Captain Underpants and the Preposterous Plight of the Purple Potty People, Dog Man Wiki

Captain Underpants and the Attack of the Talking Toilets, Captain Underpants Wiki

Mr. Krupp, Captain Underpants Wiki

Captain Underpants & the Preposterous Plight of the Purple Potty People: Dav Pilkey: 9780756972332: : Books

The Turbo Toilet 2000, Captain Underpants Wiki

Captain Underpants and the Preposterous Plight of the Purple Potty People, Dav Pilkey

George Beard, Captain Underpants Wiki