What it means
An ISBN (International Standard Book Number) is the unique identifier that lets the book trade — retailers, wholesalers, libraries, distributors — order, list and track a specific product. It has been 13 digits since 2007, starting 978 or 979, and its parts encode a country or language group, the publisher, the title and a check digit.
One ISBN describes one edition in one format. A paperback, a hardcover, an ebook and an audiobook of the same book need four numbers; a corrected reprint does not, a revised edition does. The number goes on the copyright page and, as a barcode, on the back cover.
ISBNs come from national agencies. In the US Bowker sells them (one is expensive; blocks of ten or a hundred are far cheaper per number); in the UK, Nielsen; in Canada and many other countries they are free from the national library. Retail platforms offer free ISBNs too, but those list the platform as publisher of record.
In Bindery
Bindery’s clean files upload to Amazon KDP, IngramSpark, Apple Books and Kobo, and its bookstore pack puts a barcode on the wrap cover; the ISBN itself comes from your national agency or the retailer.
Make the book, not the checklist
Describe a book or upload a manuscript. Bindery writes with you, typesets in LaTeX, sizes the spine from the real page count and produces printer-validated files — the watermarked proof is always free.
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