A Stage 4 graded reader from the ELI Young Adult Readers series, adapted from Arthur Conan Doyle's classic Sherlock Holmes novel. Written for upper-intermediate (B2) English learners, the story follows Sherlock Holmes and Dr. Watson as they investigate a mysterious murder linked to a dangerous secret society. The book develops reading comprehension, vocabulary, and critical thinking through an exciting detective story. It also includes comprehension activities, a glossary, cultural notes, and downloadable audio to enhance listening comprehension, pronunciation, and reading fluency.