Classic for strong boys. Once again, Sherlock Holmes and his sharp mind are needed. In a mysterious turn of events, the uncle of Sherlock's assistant Bob has disappeared. His trail leads deep into a dark moorland. Right there, a sinister dog is causing trouble. The master detective, of course, won't let this hocus-pocus rattle him... or will he? Adventurers and detectives - classics made easy to read. Based on the famous novel by Arthur Conan Doyle - written in a child-friendly way and easy to read for children aged 7/8 and up. More stories of Sherlock Holmes from Arena: Sherlock Holmes, the master detective - The Mystery of the Blue Carbuncle, Sherlock Holmes, the master detective - The Riddle of the Black Stallion, Sherlock Holmes, the master detective - The Invisible Seventh Man.