RISE IN SELF-PUBLISHED BOOKS.

Analyzing its ISBN data, Bowker counted more than 391,000 self-published titles in 2012–a 59 percent increase compared to the year before. The complete report will be available at the Self Published Author site next week. Measured against self-publishing figures from 2007, that is a staggering 422 percent increase. Out of all the ISBNs counted in 2012, 40 percent were self-published books. Back in 2007, only 11 percent of ISBNs were for self-published books.