Format: Global Grey free PDF, epub, Kindle ebook
Pages (PDF): 175
Publication Date: 1915
A coded warning sends Sherlock Holmes and Dr. Watson to a country retreat, where they follow a perplexing trail of clues to unmask a murderer — and to break the stranglehold of a terrorist cult. In this, the fourth and final Sherlock Holmes novel, Doyle is at his storytelling best.