The book "Nightmare Valley 1: The Tragedy at Birleston Manor" continues the fascinating detective world created by the famous Arthur Conan Doyle. The hero of the book - the famous detective Sherlock Holmes, together with his constant friend Dr. Watson, once again find themselves in the very center of mysterious events. The action unfolds in a cozy English village, where the wealthy Birleston estate is prominently located. Here, among luxurious halls and secrets, a terrible tragedy occurred, the discovery of which will be a new challenge for Holmes. Will he be able to solve the mystery of this crime and uncover the truth about the dark secrets hidden under the thick curtains of Birleston Manor? Arthur Conan Doyle offers readers another fascinating adventure detective story that convincingly demonstrates the author's mastery in plot creation and creating an atmosphere of unsolved mysteries.