- Series Level: Level 2
- Adapter: Maria Cleary
- Illustrator: Giulia Sagramola
- School Type: Middle School
- Language Level: CEFR A1/A2
- Components: Reader, Audio CD, e-zone resources
When legendary detective Sherlock Holmes and his trusted friend, Doctor Watson, are asked to investigate a mysterious organisation, the Red-headed League, they find that there is more to the organisation than meets the eye.
