The big story I now perceive is a bifurcation of the market between what used to be called high and low culture. For genre fiction (think sexy vampires) and other genres where there is a lot of self-publishing, readers seem to be moving to cheap (often 99 cent) ebooks from Amazon’s large and growing self-publishing program. Amazon doesn’t release its ebook sales stats, but we know that they already have 65% of the ebook market and through their self-publishing program may reach a disturbing 90% in a few years. Meanwhile, middle- and high-brow books for the most part remain at traditional publishers, where advances still grease the wheels of commerce (and writing).
▻http://www.dancohen.org/2016/07/12/whats-the-matter-with-ebooks-an-update