Laugh out loud with Captain Underpants, from Dav Pilkey, the creator of Dog Man! Tippy Tinkletrousers is back in the ninth full colour book in this #1 New York Times bestselling series. George and Harold are behind bars for a crime they didn't commit! But just as they are settling into their new life, they are pulled from prison by a time-travelling tyrant named Tippy Tinkletrousers! Now the boys are taking a trip back in time to the carefree days of kindergarten, when the scariest thing they ha ...