Trama
Contains: [Hound of the Baskervilles](https://openlibrary.org/works/OL262454W) [Sign of Four](https://openlibrary.org/works/OL262438W/The_Sign_of_Four) [Study in Scarlet](https://openlibrary.org/works/OL262496W/A_Study_in_Scarlet) Valley of Fear