The state of the growth of the ebook market is a contentious topic in digital publishing at the moment.
On the one side we have people arguing based on far from complete data that growth has flattened, while on the other side we have people, some with an emotional investment in continued growth, arguing that the data is incomplete and providing anecdotal evidence that they're still seeing increased.
The topic is so contentious that I was surprised yesterday when I came across an infographic which (almost) reports on the topic fairly. It's from Sainsbury's, and it appears to have been created in August so it is a little out of date and is missing a lot of current data.
But in spite of its shortcomings it's still a fairly balanced infographic. Enjoy.