Hello, I was curious to know if anyone else has made the same observation as myself. After having read older editions of some text, and compared them to the newer editions, I have noticed that some of the older editions are better. Is this generally true? How can I discern between the older editions of a particular textbook and its newer edition? I ask, because rather than buy every edition of a textbook, and compare them myself, I would rather buy just buy one edition that generally seen as good.