Captain Underpants Band 8

George and Harold's time machine, the Purple Potty, takes them to a totally crazy place in the eighth book of this number 1 New York Times bestselling series by Dav Pilkey, the author and illustrator of Dog Man. The teachers are nice, the cafeteria serves delicious food, and the principal, Mr. Krupp, finds George and Harold hilarious. But something is very, very wrong – and it gets worse when the boys' pet pterodactyl, Crackers, and Sulu, the bionic hamster, are captured by George and Harold's evil doppelgängers. Now, George and Harold must face their biggest enemies yet: themselves! Can they handle this chaos on their own, or do they need Captain Underpants to save the day?.