The six horrible Herdman children create mayhem during Halloween. Annotation. The Herdmans plus Halloween have always spelled disaster. Every year these six kids -- the worst in the history of Woodrow Wilson School, and possibly even the world -- wreak havoc on the whole town. They steal candy, spray-paint kids, and take anything that's not nailed down. Now the mayor has had it. He's decided to cancel Halloween. There won't be any Herdmans to contend...

Young Mary Elizabeth relates the humorous misadventures of her brother Louis and the other wacky members of her unpredictable, very odd family.

Beware the Herdmans! They're the nastiest, dirtiest kids you could ever meet...but they've just decided they belong in this year's pageant. When the curtain finally goes up, a miracle begins-and it turns into the best Christmas pageant ever!