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 has written and illustrated numerous popular, award-winning books for children, including the Captain Underpants and Dumb Bunnies series; Dog Breath, winner of the California Young Reader Medal; and The Paperboy, a Caldecott Honor Book. He lives with his wife in the Pacific Northwest. In 1996, Dav moved to Seattle, Washington. He then took a ferry from Seattle to Bainbridge Island, WA where he has lived since 1999. He divides his time between Bainbridge Island, WA and Minami Izu, Japan.