Death Cloud (Sherlock Holmes The Legend Begins series) by Andrew Lane

This was recommended to me by one of my students. It is the only "young Sherlock" series that has been approved by the estate of Sir Arthur Conan Doyle, which made me immediately interested. It didn't disappoint. It is clear that Lane has done his research. If you know the Holmes stories, you can see the seeds of interest and skill that will grow into the great detective. Even if you have never read Sherlock Holmes, you will find these stories to be a fun read with lots of action, adventure and mystery.