Question: do audiobooks have isbn numbers?
Answer: This 10 or 13-digit number identifies a specific book, an edition of a book, or a book-like product (such as an audiobook). Since 1970 each published book has a unique ISBN. In 2007, assigned ISBNs changed from 10 digits to 13. On most books, the ISBN number can be found on the back cover, next to the barcode.