George and Harold have really done it this time . . . they've created a MONSTER! She's faster, smarter, and more evil than anything the world has seen before - she's Wedgie Woman! With the help of her horrible robots and her horrendous hairdo, Wedgie Woman is on a mission to take over the world, and she'll give a whopping wedgie to anyone who stands in her way - including Captain Underpants.

Will Wedgie Woman's wicked ways spell the end for our heroes? You'll have to read the book to find out. And in the meantime . . . watch your back!