The latest Author Earnings report from Hugh Howey and Data Guy refines the methodology of earlier reports, using better data, and finds that the previous figures were actually pretty accurate. 

Indie growth continues in ebook sales, as expected, but also in print and audio. And ebook sales overall continue to grow, now to over $2 billion a year from Amazon alone (almost half of which isn’t accounted for by the sources that traditional publishers, and most journalists, use, because of books that don’t have ISBNs).