Penguin Readers is an ELT graded reader series. Please note that the eBook edition does NOT include access to the audio edition and digital book. Written for learners of English as a foreign language, each title includes carefully adapted text, new illustrations and language learning exercises. Titles include popular classics, exciting contemporary fiction, and thought-provoking non-fiction, introducing language learners to bestselling authors and compelling content. The eight levels of Penguin Readers follow the Common European Framework of Reference for language learning (CEFR). Exercises at the back of each Reader help language learners to practise grammar, vocabulary, and key exam skills. Before, during and after-reading questions test readers' story comprehension and develop vocabulary. Unlocking the Universe, a Level 5 Reader, is B1 in the CEFR framework. The text is made up of sentences with up to four clauses, introducing present perfect continuous, past perfect, reported speech and second conditional. It is well supported by illustrations, which appear regularly. Unlocking the Universe takes us on a journey through space and time. It starts 13.8 billion years ago with the Big Bang, which led to the stars, the planets and our Solar System. Then it explores our Solar System and other solar systems - the ones we know, and others we have yet to find. Visit the Penguin Readers website Register to access online resources including tests, worksheets and answer keys. Exclusively with the print edition, readers can unlock a digital book and audio edition (not available with the eBook).