: If a code is missing or fails, users must contact Penguin Customer Support with a photo of the book as proof of purchase. How to Use It
However, you have two unofficial options: penguin readers unlock code
with the book title and a photo of the book for verification. Second-Hand Books : If a code is missing or fails,
: For many titles, the unlock process also provides access to MP3 recordings of chapters, which is essential for improving pronunciation and listening comprehension. penguin readers unlock code