Since 2011, International Standard Book Numbers (ISBNs) for self-published titles have climbed 218.33%, according to the latest report from ProQuest affiliate Bowker.
A total of 786,935 ISBNs were assigned to self-published titles in 2016; in 2011, that number was 247,210.
This new study from Bowker highlights the latest self-publishing trends in print and ebook formats. For 2016 vs. 2015, the numbers indicate a continuing growth trend for print (+11%), though at a slower rate than a year ago (+34%). Ebooks show a slight decline in the number of title registrations (-3%), but this is a significantly smaller decrease compared to the prior year (-11%).
“Overall, we believe that these numbers point toward an ongoing maturation and stabilization of the self-publishing industry,” notes Beat Barblan, Director of Identifier Services at Bowker. The report also indicates that the self-publishing industry is dominated by three service providers which, combined, account for over 84% of all print and ebook titles published last year.
Direct to Full Text Report (10 pages; PDF)