Self Publishing Serial Number A unique number for your publication One number. One public record. Simple application. Human review. Made for independent publishing Easy for anyone to look up

The SPSN Standard

The SPSN Standard explains how each number is built, how numbers are issued and when a publication needs a new one.

In this section

3 pages

  1. Identifier structure and check digit See what each part of an SPSN means and how the final digit is calculated.
  2. Assignment, permanence and non-reuse Learn how numbers are assigned and why an issued number is never used again.
  3. Editions, versions and formats See when a changed publication needs a new SPSN.