Quote:
Originally Posted by crich70
I agree that you want the most up to date edition. Otherwise it would be like using an encyclopedia set from the 1980's say. Nothing since the release date will be in them and you will just make it that much harder on yourself to be learning the course. On the other hand the new edition may be just the old one with the formatting changed. To know that you would have to talk to the teacher. He/she has to know their own field of study. 
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Quite a few of the university texts I used were authored or co-authored by the person teaching the course. Hmmm... royalty from selling a new copy or let the student get away with buying a cheaper used edition. Decisions, decisions....