THROUGH THE LOOKING GLASS! Things go from bad to catastrophic as Demona — despite Gosalyn’s best efforts to thwart the rogue Gargoyle — cracks open the wizard Gandersnatch’s vault inside the Mirror Realm and claims the terrifying tome known as the Quackronomicon for her own! But what hair-whitening horrors will she summon from its eldritch depths? And more important, how can Darkwing, Goliath, and their erstwhile allies stop them?