How, in the process of answering a specific programming question on Stackoverflow, would a link to a book on project management be appropriate? Also, what's up

How, in the process of answering a specific programming question on Stackoverflow, would a link to a book on project management be appropriate? Also, what's up with the phrase "I'm surprised" that always comes up in threads like this: If you believe a book should be higher up, tell us why! Or do you question the author's methodology? If you misjudge the current significance or influence of a thing, ... so what?