Bowker has issued a new six-year overview of self-publishing output, prepared in conjunction with their sister company Proquest. While the report provides more robust counts of self-published books annually than the numbers found in Bowker’s regularly, yearly looks at newly published books, there is still one big flaw in using the data to draw sweeping conclusions. Bowker declares: “While self-publishing is alive and well and still showing very healthy growth rates, gone are the days of 60% growth year over year. As the charts in this report show, self-publishing has matured and slowed down to a steadier, less frantic pace.” […]