Captain Underpants and the Tyrannical Retaliation of the Turbo Toilet 2000

The Turbo Toilet 2000 returns in the eleventh book in this #1 New York Times bestselling series by Dav Pilkey, the author and illustrator of Dog Man!
Just when you thought it was safe to flush, the Turbo Toilet 2000 strikes back! The carnivorous commode known for devouring everything in its path has built up a real appetite… for REVENGE! Luckily, the fate of humanity is once again in the hands of George and Harold and their annoying nemesis Melvin Sneedly. Will Wedgie Power prevail? Or will the amazing Captain Underpants be flushed away forever?