The book is filled with useful vocabulary that is carefully graded and easy to understand, it also comes with audio, so that you can listen to the story at the same time as reading. 'He's an intelligent man. He was once rich and is now poor. His wife loved him once, but she doesn't love him now. And he's thirty or forty years old.One look at an old hat, and Sherlock Holmes can tell you a lot about its owner. He sees - and thinks - a lot more than the people around him, and when a beautiful blue diamonddisappears, Sherlock is the only man in London who can find it.