Of the four novels, or longer stories, which Arthur Conan Doyle wrote about Sherlock Holmes, The Valley of Fear is the poor relation. A Study in Scarlet (1888) saw the creation of Holmes and Dr Watson. The Sign of the Four (1890) is the most perfect, The Hound of the Baskervilles (1902) the most dramatic of the longer narratives. The Valley of Fear has had its champions, but it is the least known and read of the four. The first installment of the tale appeared in the Strand Magazine in September 1914, and it came out in book form the following year, in the USA (published by George H. Doran in February) and in Britain (from Smith, Elder, in June).
Like The Hound of the …
Kerr, Douglas. "The Valley of Fear". The Literary Encyclopedia. First published 09 September 2009
[https://www.litencyc.com/php/sworks.php?rec=true&UID=26983, accessed 22 November 2017.]