The article covers the history of Barnes & Noble. There are facts about B&N's beginnings, Microsoft's investment in the Nook, the dethroning of B&N by Amazon and Kindle, and B&N's continuing face-off with S&S. The whole article is truly interesting.
Be warned, this article is very, very long. So, bring a b-i-g cup of tea when you read it.
If you're interested in how B&N and Nook came to their current position in the ebook market, tootle over to Tears for Goliath