CHOOSE YOUR IDENTIFIER
One number for books, another for ongoing publications.
ISBN
International Standard Book Number — 13 digits
For books, ebooks, and audiobooks. Every edition and format of a title receives its own ISBN, distinguishing it clearly for booksellers, libraries, and distributors.
Apply for ISBNISSN
International Standard Serial Number — 8 digits
For newspapers, magazines, journals, and annuals. A single ISSN identifies the whole publication series, regardless of how many issues follow.
Apply for ISSN