Re:It's crap (Score 0)

In canada , you only need to make 3 changes in total to release a NEW edition, whether those 3 changes are typos corrected, new graph or picture, or even 3 new problem/equations, they can change the edition, I had a great calculus professor who would assign the work from both 7th and 8th editions, usually the pages were 2 pages apart and the questions assigned maty have been as close as #s 1 4 7a. 7b. and 9 from 7th edition page 211, and #s 1 5 8a. 8b. and 10 from 8th edition, of course the university bookstore would not accept returns for part of the cost on older editions, even if the new edition was only 1 week old, just my 2 cents