The Valley of Fear (Sherlock Holmes) - Tapa blanda

Sherlock Holmes and Dr. Watson receive a letter from an informant known by the pseudonym Fred Porlock. Porlock is part of Professor Moriarty's criminal organization. The letter is written in a numeric code, and Holmes decodes the letter, which warns that John Douglas of Birlstone House is about to be murdered.

Sir Arthur Conan Doyle, an Edinburgh born physician and writer most famous for his stories about the detective Sherlock Holmes, considered a milestone in the field of crime fiction. A prolific writer whose other works include science fiction stories, plays, romances, poetry, non-fiction, and historical novels. After graduating from Edinburgh University he first worked as a surgeon on a wailing boat and later settled in Portsmouth on the English south coast dividing his time between medicine and writing.