Dav Pilkey's newest epic novel finds George, Harold, and everyone's favorite superhero in the stickiest situation yet. This time, the boys' latest prank has snotty school brainiac Melvin Sneedley in a stink. And when Melvin tries to transform himself into a bionic-powered superboy, things go from bad to boogers, literally, and the Bionic Booger Boy is born! With fun Flip-O-Rama and loads of laffs, here's another excellent adventure that will leave Captain Underpants fans begging for more. SPECIAL BONUS CLIFFHANGER ENDING INCLUDED!