Something sinister is afoot in the house in the west of Ireland in which
Sherlock is staying. There are frightened whisperings among the servants and
the houses owners are clearly scared. But who or what? has terrified them
so much that nobody will speak out? Young Sherlock must bring all his powers of
deduction to unravelling his greatest mystery yet.

Another fast-paced, brilliantly plotted adventure as teenage Sherlock
investigates a new crime and comes up against a fresh crop of sinister, clever
criminals.