This puzzle book puts you in control of your very own interactive adventure! You’ll be taking on the role of Sherlock Holmes, the world’s most brilliant detective. Your mission: to retrieve the stolen Musgrave Diamond, and thwart criminal mastermind Moriarty’s diabolical scheme! Use your observation and logic skills to uncover clues. Then choose the correct answer from a selection of options to progress through the story in a race against time. Can you solve the mystery?