Declining eBook sales, and this has nothing to do with the effects of Brexit, this is routine sales figures for the last quarter. Nate Hoffelder at the-digital-reader.com flags up the recent reticence of the Big Five/Six to discuss eBook revenues, and the apparent decline in sales.
Jim Milliot picked up the thread in Publishers Weekly looking at the decline in eBook sales, citing user preferences changing and wanting more time away from screens.