Captain Underpants and the Perilous Plot of Professor Poopypants #4
$12.99
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And when Professor Pippy P. Poopypants becomes their new science teacher . . . well, George and Harold almost cause the entire planet to be taken over by a maniacal, mad-scientist guy in a giant robot suit! Who will stop the perilous plot of Poopypants?!!? This looks like a job for Captain Underpants!
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