Penguin Readers is an ELT graded reading series, designed for teenagers and young adults learning English as a foreign language.

With carefully adapted text, new illustrations, language practise activities and additional online resources, the Penguin Readers series introduces language learners to bestselling authors and compelling content. Titles include popular classics, exciting contemporary fiction, and thought-provoking non-fiction.

The Adventures of Sherlock Holmes, a Level 4 Reader, is A2+ in the CEFR framework. The text is made up of sentences with up to three clauses, introducing more complex uses of present perfect simple, passives, phrasal verbs and simple relative clauses. It is well supported by illustrations, which appear regularly. Sherlock Holmes is an intelligent detective who works with his friend Dr Watson. In The Adventures of Sherlock Holmes Watson and Holmes find the answer to four different and exciting mysteries.