[ecspike]

I spent a lot of time in undergrad researching to find the books cheap online or buy the Indian paperback version that is only hardcover in the US. The oncampus bookstore gave peanuts when you sold it back and some profs were oblivious and would just require the newest version when the older version would work.

There needs to be a minimum amount of content that has materially changed in order to call it a new edition. Moving questions around and adding a word here or there is not cool.