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In their eighth epic adventure, George and Harold use the Purple Potty to travel to an alternate universe where teachers care, the library has books, and kids eat at a five-star gourmet cafeteria. Unfortunately they also encounter Evil George and Evil Harold, who transform good Mr. Krupp into Captain Blunderpants. The evil duo also steal the boys' pets, Crackers and Sulu, and hitch a ride back to George and Harold's world. They might destroy that world with Evil Sulu, the world's biggest baddest bionic hamster, but are thwarted by the arthritic avengers Boxer Boy and Great-Granny Girdle and their geezer power. Part novel, part comic book, and part Flip-o-rama (add your own sound effects), this newest adventure will not disappoint the legions of Captain Underpants fans.