I was in Barnes & Noble about a week ago because I needed a certain physical book (i.e., not a digital copy). They looked it up on the computer and said "Here it is!" To which I said, "Great, just send me in the right direction and I'll find it." Their response: "Oh, we don't actually carry it, but we can order it for you!"
I did, however, get the chance to pull off a fun line. While I was talking to the guy looking up the book, someone asked where the Self-Help area was. My reply: "Doesn't that defeat the purpose?" The inquirer just stood there confused wondering why the employee was laughing... *Sigh...*