Tra-la-laaa! The NEW YORK TIMES and USA TODAY bestselling Captain Underpants series is now available in ebook edition, featuring Flip-E-Rama, bonus content, and more! When we last saw George and Harold, they were headed to jail for the rest of their lives. What could be worse? How about being pulled from prison by a time-traveling 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 had to face was NOT