Ghosthunters Books in Order

Tom discovers a slimy ghost hiding in his cellar because an even more terrifying spirit has driven it from home. With help from expert ghosthunter Hetty Hyssop, he learns that frightening apparitions can have problems of their own.

Tom, Hetty Hyssop, and Hugo the ghost face an unusually dangerous assignment at a seaside hotel. A blazing apparition has occupied its penthouse and is turning guests into ghosts, forcing the team to devise a plan against fiery supernatural power.

Tom's quest for a Ghosthunting Diploma leads him to haunted Bogpool, where a mud-loving minotaur commands an army of ghosts. What begins as an examination becomes a race to prevent the creature's plans for catastrophe.

Tiny biting ghosts infest Gloomsburg Castle, where a murderous baroness appears to have possessed the landlady. While Hugo falls for the foul-smelling spirit, Tom must devise a way to stop the haunting before its dangers worsen.