The American versions are just that, the American Versions. They are published by Scholastic on new paper(the hardbacks are, but paperbacks are recycled) with Mary Grand-Pre's illustrations and unique formatting. The Canadian versions are exactly the same, text wise and format-wise as the UK versions. The UK versions are printed on new paper, but those printed in Canada on recycled paper(which lends them a "cheap" feeling). Neither have Mary Grand-Pre's illustrations. Also, Canada and the UK have "childrens versions" with colorful covers, and the "adult versions" with photorealistic covers that are more "mature" and have a Pic of JKR on the back(like most "adult" novels).