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Bowker Report Shows Record Growth in US ISBN Registrations

Annual statistics reveal a 12% increase in self-published print and digital ISBN assignments across independent presses.

Daniel OseiPublished Updated 1 min read

Bowker, the official US ISBN agency, has published its annual report on ISBN registrations, recording a 12% year-over-year increase in new ISBN assignments for self-published print and ebook titles.

The report underscores the continued professionalization of independent publishing, as more authors acquire dedicated publisher-of-record ISBNs rather than relying solely on free retailer-assigned identification numbers.

Data Breakdown

  • Print vs. Digital: Print ISBN assignments for independent titles grew by 14%, driven by strong demand for hardcovers and special editions.
  • Small Press Growth: Micro-presses and author imprints registered thousands of new ISBN prefixes.
  • Distribution Advantage: Owning a custom ISBN enables authors to list titles across multiple distributors without catalog conflicts.

The findings highlight that independent publishing accounts for an expanding share of overall US title output.

Sources

  1. 01Bowker Industry Data Reportsaccessed

Daniel Osei

Senior reporter

Daniel writes on contracts, rights and the business of independent publishing.

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