Harley Quinn investigates a high-tech carnival in this action-packed new DC Super Hero Girl novel!

Funny girl Harley Quinn loves fighting crime with her classmates like Wonder Woman, Batgirl, and Supergirl, but she always does it her with own madcap style--and a big mallet! It's no surprise that Harley can't resist getting involved in a dance competition and organizing an outrageous battle of the bands. But when a high-tech carnival comes to town, Harley knows that things aren't what they seem and that only she can get to the bottom of the mystery--and deliver a great punch line while doing it!