Hades and the Helm of Darkness Graphic NovelHades and the Helm of Darkness Graphic Novel is the centre of the (under)world in the third book of the graphic novel adaptation of the popular Heroes in Training series! The Underworld usually isnt anyones idea of a fun placeexcept for Hades. He loves the dark and even the stinky smell of sulphur! But there is one thing that Hades is not a fan of dogs. And when Zeus and his fellow Olympians encounter Cerberusa mean, snarling, three headed dogHades