Captain Underpants and the terrifying return of Tippy Tinkletrousers

In their ninth epic adventure, George and Harold encounter a familiarface - Professor Poopypants! He now goes by the name Tippy Tinkletrousersand is determined to seek revenge for all of the teasinghis old name inspired. Now it's up to George, Harold, and theamazing Captain Underpants to stop Tippy Tinkletrousers beforeit's too late!