"The Valley of Fear is the fourth and final Sherlock Holmes novel by Sir Arthur Conan Doyle.
It is loosely based on the Molly Maguires and Pinkerton agent James McParland. The first book edition was published by George H. Doran Company in 1915. The story starts with Sherlock Holmes receiving a ciphered message from an agent of Professor Moriarty but without the key to the cipher. The book is divided into two parts: The Tragedy of Birlstone and The Scowrers."
CONAN DOYLE ARTHUR
Sir Arthur Conan Doyle Edimburgo, 1859- Crowborough, 1930 fue médico, novelista y un destacado miembro de los círculos espiritistas ingleses. Su primera obra sobre Sherlock Holmes fue Estudio en escarlata 1887 y, aparte de la famosa serie detectivesca, escribió novelas históricas e incluso teatro.
