Penguin Readers is a graded reading series for English Language Teaching (ELT) markets, designed for teenagers and young adults learning English as a foreign or second language.

Oskar Shell is a clever nine-year-old boy. When his father is killed in the attacks on the World Trade Center on September 11th 2001, Oskar wants to learn the secret about a key that he discovers in his father's closet. His search takes him on a journey through New York and into the lives of strangers and relatives. But will it bring him any closer to his lost father?

Penguin Readers is a series of popular classics, exciting contemporary fiction, and thought-provoking non-fiction, written for learners of English as a foreign language. The series is aligned to the Common European Framework and includes language activities that help develop key skills.

Extremely Loud and Incredibly Close, 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.