Publishing
A publication date the production plan can support
A publication date should follow the production dependencies and the date readers need to obtain the book.
Identify the edition, not just the words
An ISBN is an identifier used for a publication product. The International ISBN Agency explains that distinct formats and editions are identified separately. A paperback, a hardback and another qualifying format are therefore not interchangeable merely because they contain the same text. Language and edition differences can also matter.
This distinction helps explain why an author should settle the intended products before assigning identifiers. Write a small format record with the title, language, edition description and binding or digital product. Keep it beside the production specification. A number copied from another format can create confusion in records and ordering even when it looks correct on a cover.
The number itself does not describe the book's quality, establish readership or replace the descriptive information that accompanies it. Treat it as an accurate identifier within a larger set of records. The title, contributor names, publisher information and format still need careful checking.
Work through the appropriate agency
Consult the ISBN agency responsible for your publishing location and circumstances. Allocation arrangements vary, so use current official instructions for eligibility, registration and any charges. If a publishing service supplies an identifier, read what that arrangement means for the publisher information and use of the number before choosing it.
Keep a record of every number allocated to a project and the product to which it has been assigned. Do not use an unlabelled list that requires you to remember which number belongs to the ebook and which to the paperback. Include the assignment in the files supplied to the cover designer and in the metadata record used for upload.
Check the full number wherever it appears. A barcode, a copyright-page entry and an online record should correspond to the intended product. Copying from one authoritative record reduces typing mistakes, but the final output still needs to be inspected.
Review changes before reusing the record
A corrected reprint and a substantially revised edition are not automatically the same situation. Before republishing altered material, check the agency's current guidance about whether the change requires a new ISBN. Do the same when changing the physical or digital product. A convenient old number is not a reason to avoid identifying a genuinely different edition correctly.
Keep earlier publication records intact when a new product is created. Readers, booksellers and libraries may still encounter older copies, and you may need to distinguish them when answering a query. Record the relationship between editions clearly rather than overwriting the old entry with new details.
For a first release, the immediate task is modest: define the product, use the appropriate official allocation route, and ensure the assigned number agrees across the book and its metadata. That consistency makes the identifier useful to everyone who needs to distinguish the edition.
