I realise that it is now hard to find with no new printing in sight, but if you ever do spot a copy somewhere, you need it. If you went to university and ended up flipping burgers, buy it. If you've ever found yourself in a strange place after having lied your way into employment and about to do something you're having second thoughts about, buy it. If you're just entering the work force for the first or sixty fourth time, buy it!