ISBN (International Standard Book Number) barcodes are needed for books, novels, e-books and once-off publications. Without an ISBN barcode, the book will not be accepted to be sold in retail or book stores, online stores, distribution houses, etc. Each volume, variation or edition of your book will need a unique ISBN number.
ISSN (International Standard Serial Number) barcodes are used for newspapers, magazines or recurring publications. Without an ISSN barcode, the serial publication will not be accepted to be sold in retail stores, online stores, distribution warehouses, etc. Each edition, variation or issue of your serial publication may need a unique ISSN number; however this is not always the case.
Case barcodes, also known as ITF-14 barcodes, are used for distribution and storage purposes. Case barcode numbers reflect the ISBN or ISSN barcodes of the items contained in it. Each delivery size or quantity will need a unique case barcode number.