The second remarkable case for the Invisible Detective.
History repeats itself . . .
London, today: Arthur Drake is beginning to understand how he is linked to the boy who wrote the Invisible Detective's casebook over eighty years ago. But there's no time to investigate further - a monster is loose in London, and Arthur must get help from the past . . .
A deadly puzzle . . .
London, 1936: Whatever your problem, the Invisible Detective can find the answer. But no one suspects that he's just a front for four children, who solve crimes and mysteries in his name . . .
How can a daring bank robbery be linked to a missing cat? Why are the local rats over-running houses and attacking people? Where will the trail of discarded bank notes lead? It seems that only the Invisible Detective can discover the answers as the kids hunt for the robbers - and track down a monster . . .
