Meanwhile, Amazon is looked at as the behemoth in the industry, yet it probably isn't thought of as an online book store / publisher by most people. I think of so many things before I get to, "Oh yeah, they also sell books."
The one piece of information that I wish the article had mentioned is the age demographics of avid book readers. My gut tells me the market has dropped significantly in the last ~25 years, but I'd like to see the data.