"Charles thought he was prepared to be a monster mediator's assistant. After all, following Margo Maloo on her cases has already taken him to some of Echo City's most perilous places: a vampire's lair, an ogre's den, and even a monster grocery store. But now that Margo has disappeared on a secret mission on her own, Charles must face one of the biggest conundrums of his career alone: Who is the mysterous online presence know as the_eldritch_truth and why are they luring kids and monsters into disaster? On top of that, a family of giant spiders is trapped inside the old sugar factory, and a demolition crew is about to blow the building to smithereens! Will Margo turn up in time to save the day? How far will Charles have to go to uncover the truth? There is one place in Echo City he hasn't been yet... the mysterous place the monsters call Downside." -- Page [4] of cover.