Most books destined for print need a barcode to facilitate tracking and sales. The barcode is generated from the thirteen digit international standard book number (ISBN). Bookstores prefer that the barcode is placed against a very light or white background, and is approx 36mms across. The width of the barcode is more important than height for scanning purposes. Chameleon Print Design generates barcodes for our clients at no added cost (via a plugin built into the book layout package). Otherwise, the issuer of ISBNs in Australia (DW Thorpe) can supply the electronic barcode file for a fee.