Sherlock: The Sign of Four

The series Sherlock offers a fresh, contemporary take on the original Sir Arthur Conan Doyle stories and has helped introduce a whole new generation of fans to the legendary detective—these tie-in editions feature introductions from the show's creators and actors

Sherlock and Dr Watson receive a visit from Mary Morsten, who offers up a particularly cryptic puzzle for them to solve. Her father went missing six years ago, and since then, she has received a pearl for every year he has not reapp...