George and Harold are up to their old tricks again, and when their latest prank makes a direct hit on school brainiac Melvin Sneedly, he decides to get even! But in the blink of an eye -- and the sneeze of a nose -- Melvin goes from snooty to snotty, and the Bionic Booger Boy is born! Can Captain Underpants clean up this catastrophe, or will the mucous monster make a mess of things?

DAV PILKEY is the creator of many acclaimed children's books, including Dogzilla, Kat Kong, god bless the gargoyles, and the bestselling Captain Underpants series. His book The Paperboy received a Caldecott Honor. He lives in the Pacific Northwest. www.pilkey.com

DAV PILKEY is the creator of many acclaimed children's books, including Dogzilla, Kat Kong, god bless the gargoyles, and the bestselling Captain Underpants series. His book The Paperboy received a Caldecott Honor. He lives in the Pacific Northwest. www.pilkey.com

The critics are CRAZY about UNDERPANTS!

"Irresistible." -- Entertainment Weekly

"Call Pilkey... the savior of the 'reluctant reader.'" -- USA Today

"So appealing that youngsters won't notice that their vocabulary is stretching." -- School Library Journal

"Pilkey's sharp humor shines, and is as much fun for parents as their young readers." -- Parents' Choice Foundation

"Combines empowerment and empathy with age-appropriate humor and action." -- Booklist

"Celebrates the triumph of the good-hearted." -- The Educational Book and Media Association