William and Thomas are off on their madcap adventures around the village of Little Hardleigh once again.
More than once, William's ghostly skills help to solve some heinous crime or puzzling mystery.
Be it Secret Messages, Hidden Paintings or Runaway Hot-Air Balloons, the pair are always on the case, with an ink-stained notebook and a fresh jar of ginger nuts to hand. And there's even a little sprinkling of Movie Magic coming to Hardleigh Hall!
Loaded with clue summaries, suspect lists and lots of action, readers can help William and Thomas in their efforts to become great detectives