Captain Underpants and the Big, Bad Battle of the Bionic Booger Boy, Part 1: The Night of the Nas : The Night of the Nas [Hoopla electronic resource] / Dav Pilkey.
George and Harold are up to their old tricks again, and when their latest prank makes a direct hit on school brainiac Melvin, he decides to get even! But in the blink of an eye -and the sneeze of a nose- the Bionic Booger Boy is born! Can Captain Underpants clean up this catastrophe, or will the mucous monster make a mess of things?