- Intrepid ghosthunter-in-training Tom has battled Incredibly Revolting Ghosts, Gruesome Invincible Lightning Ghosts, and a Totally Moldy Baroness. But it ends up nothing - NOTHING - is more frightening than...final exams. To earn his Ghosthunting Diploma, Tom"s got to nab a Deadly Messenger: the hardest ghost of all to catch. And while on the hunt, he stumbles into the yucky, mucked-up lair of a mud-dripping minotaur demon who"s assembled a ghoul army with the goal of world domination. Suddenly there"s a whole lot more at stake than Tom"s graduation: This is one test the team can"t fail!