When Miss Mary Morstan arrives at 221B Baker Street with a mysterious summons, Sherlock Holmes and Dr Watson are drawn into a web of intrigue, lost treasure, and long-buried secrets stretching from the dark heart of Victorian London to the distant reaches of colonial India. As Holmes applies his legendary powers of deduction to untangle the puzzle, Watson finds himself facing both danger and unexpected romance.
The Sign of the Four is the second full-length Sherlock Holmes novel by Sir Arthur Conan Doyle, renowned for its gripping plot, atmospheric settings, and unforgettable characters.

This special edition is the second volume of the “Sherlock Holmes...As It Happened” series, bringing new historical context analysis, detailed foreword and unique period illustrations to one of literature’s most celebrated mysteries. Perfect for both first-time readers and devoted Holmes enthusiasts, it is a journey through suspense, adventure, and the unique partnership between the world’s greatest detective and his loyal friend.