Oh wow, that's very cool. Did he do this as a SEO hack or just as an easy-to-remember shortcut for his book?

His illinois.edu page is the second hit for me for "algorithms wtf" in DuckDuckGo and the first hit in Google. There is a non-zero probability that I would find his book by searching for that.

Edit: Sorry if this came across as disrespectful. I don't think that a SEO hack in this case is bad. If you put your care and attention into writing and revising a 472-page textbook, you want people to find it. There's nothing wrong with that.