Back at the point in time when Apple and the big six were talking about agency model pricing -- which the DoJ brought the price-fixing case over -- Amazon&#x27;s penetration was around 90%. (I&#x27;m of the opinion that the DoJ case is therefore evidence that US anti-trust law is broken; Amazon were <i>clearly</i> operating a predatory monopoly, but the DoJ went after the much easier target because price fixing is easier to prove.)<p>Speaking as an author published by the major houses (Penguin Random House and Macmillan in the USA; Macmillan and Hachette in the UK) I&#x27;m not seeing my books hitting the ebook bestseller charts much -- but I&#x27;m not seeing my sales decline relative to where they were a few years ago, either. What seems to be happening is that the bestseller charts are being dogpiled by self-published titles on deep discount -- 99 cents to $2.99 seems to be typical. And the old joke &quot;sell it at a loss, we&#x27;ll make it up on volume&quot; seems apposite at this point.