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In Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy, Part 2: The Revenge of the Ridiculous Robo-Boogers, George and Harold are on the run from a new threat: the Ridiculous Robo-Boogers, which are the result of the botched transformation of their nemesis, Melvin Sneedly. Their new pet, Sulu the Bionic Hamster, must help them battle these disgusting, snot-fueled foes and find a way to stop the chaos. The book concludes the two-part arc with the series' signature blend of humor, action, and Flip-O-Rama.
$3.00