Peter Buckroyd & Annie Fox 
Oxford Literature Companions: The Sign of Four [PDF ebook] 

Easy to use in the classroom or as a tool for revision, Oxford Literature Companions provide student-friendly analysis of a range of popular GCSE set texts. Each book offers a lively, engaging approach to the text, covering characters, themes, language and contexts, whilst also providing a range of varied and in-depth activities to deepen understanding and encourage close work with the text. Each book also includes a comprehensive Skills and Practice section, which provides detailed advice on assessment and a bank of exam-style questions and annotated sample student answers. This guide covers The Sign of Four by Sir Arthur Conan Doyle.