Is that a well known book? Because I had the same impression. Since I'm not familiar with the book, I thought their headline was way too much link bait.
That, and, over the years, an HBO animated special, a musical stage production, a non-musical stage production, and, most recently, a box-office success as a movie last year. The title has been a fairly frequent pop culture reference with the "Alexander" at the beginning and the "day" at the end replaced with other things, e.g, on the Daily Show, etc.
I thought it was pretty well known. I gave a good chuckle before I clicked on the link, and after reading the article, I thought it was actually pretty accurate. My reaction was, "well there's $140,000 that's going to stay in my bank account". :-)