In this third volume in the CHRONICLES OF THE MONSTER DETECTIVE AGENCY, there is only one horror that could be a more dreadful challenge for fledgling Monster Detective Will Allen than battling a roomful of monsters - MIDDLE SCHOOL! But if that's not enough, Will’s new case is sure to make his head spin: he has to defend a BULLY! But can Will rise to the occasion and rescue his brutish client when his special monster-fighting flashlight, the RevealeR, has suddenly turned more dangerous than the monsters themselves?