The Penguin Readers series is a range of readers for learners of English as a foreign language. It includes adapted text, new illustrations, and language learning exercises. The print edition includes instructions for accessing supportive online material. Titles include popular classic works, exciting contemporary fiction, and challenging non-fiction, introducing students to better writers and engaging content. The eight levels of the series follow the Common European Framework of Reference for Languages (CEFR). Exercises at the end of each reader help students practice grammar, vocabulary, and essential exam skills. Questions before, during, and after reading check story comprehension and build vocabulary. Macbeth meets three witches. They can see into the future. They tell Macbeth: "You are the king of Scotland in the future." Are they right? Can Macbeth become king?