What products are eligible for ISBNs?
ISBNs may be assigned to books and certain other items commonly found in bookstores. Non-book items eligible for ISBNs include e-books, audio books, calendars, bookmarks, software, greeting cards, and instructional and documentary DVDs and videos. ISBNs may never be assigned to music CDs, articles of clothing, foods, medicine, or stuffed animals, among other items.