If any part is available separately, a separate ISBN must be allocated to each part, and to the kit as a whole. Reprints do nor require different ISBNs, while new editions do. Paperback, hardback, CD-ROM, video, audio book etc. Single ISBN notifications are usually only faxed as soon as they are processed, or emailed or posted if you do not have a fax machine. An ISBN should be printed on the reverse of the title page of a book, along with copyright and publisher information.
Many publishers also print it on the bottom-right of the back cover for ease of reference.
If a book has a dust jacket, the ISBN should also appear on the back of this. The mathematical formula used to calculate the validity of ISBNs produces numbers ranging from 2 to 10 as check digits. The ISBN can be translated into a worldwide compatible barcode format. Barcode scanning is used by major bookstore chains and libraries for book publications and book-related items. The ISBN Agency can now supply barcodes .