The Sign of the Four . Notes on Sherlock Holmes is not just a book, but a real pearl of the detective genre, written by the outstanding British writer Arthur Conan Doyle. This work, published in 1890, continues to fascinate readers with its intriguing storyline and deep characters. If you love mysteries, clever investigations and the atmosphere of Victorian London, then this work will be a real discovery for you. In the center of the plot is the famous detective Sherlock Holmes and his loyal friend Dr. Watson. This time they are waiting for an unusual case related to the mysterious disappearance of treasures and a mysterious story that spans a century. Holmes is approached by a young woman named Mary Morston, whose life is full of mysteries and unsolved questions. She searches for her missing father and encounters a mysterious sign - a symbol that leads to the unraveling of an ancient mystery. The deeper Holmes dives into the investigation, the more he realizes that the case is not only about treasures, but also about betrayal, revenge and even murder. The book “The Sign of Four” is ideal for readers of all ages who appreciate smart detective stories and love to solve puzzles. It will attract both young people and a more mature audience interested in history, psychology and human relations. If you like the works of authors such as Agatha Christie or Raymond Chandler, you will definitely appreciate the skill of Conan Doyle in creating exciting stories and bright characters. The themes raised in the "Sign of the Four" are diverse and multifaceted. It explores the issues of friendship, loyalty and betrayal, as well as the impact of the past on the present. Conan Doyle masterfully shows how the shadows of stories hidden in the depths of time can affect the fate of people. The reader will be fascinated not only by the investigation itself, but also by how Holmes and Watson interact with each other, how their friendship grows stronger in conditions of danger and uncertainty. The style of Arthur Conan Doyle is distinguished by brightness and expressiveness. His ability to create an atmosphere and immerse the reader in the world of his characters makes each page a real adventure. In The Sign of Four, he uses many details that help create a living picture of Victorian London, from its gloomy alleyways to luxurious mansions. This work is not only a fascinating detective story, but also a historical reconstruction that allows the reader to feel the spirit of the time. In addition to The Sign of Four, Conan Doyle wrote many other works about Sherlock Holmes, such as The Study in Scarlet tones and The Baskerville Dog, which are also noteworthy. These books, like The Sign of Four, are filled with tension, mystery, and Holmes' brilliant conclusions, making them an integral part of detective literature. If you are looking for a book that will give you a fascinating journey into the world of mysteries and investigations, The Sign of the Four Notes on Sherlock Holmes" is exactly what you need. Immerse yourself in the world of Sherlock Holmes and discover the secrets that await their discovery!