Here's a thing. According to this article in Forbes Magazine, "Self-published" accounted for more bestsellers than HarperCollins in 2013. Only Penguin Random House and Hachette did better. Ok, it's obviously not really quite comparing like with like, and nobody's pretending it is, but an interesting statistic nevertheless, and still further evidence (as if we needed any) that the obvious story in the world of digital books is the success of self-publishing. Indie authors not only managed to hit the list 99 times in 2013 - they also managed four No. 1 best-sellers.