When Harold and George turn fourth-grade teacher Ms. Ribble into an evil monster called the Wedgie Woman, she wreaks havoc on the world, giving the wedgie of doom to unsuspecting people who stand in her way--including principal-turned-superhero Captain Underpants. George and Harold have really messed up this time. They have created the fastest, strongest, most evil monster the world has ever seen and her name is Wedgie Woman. And she'll give a whopping wedgie to anyone who stands in her way - including Captain Underpants. Ages 7-10.